ASTContext.cpp revision 71842cc07aafdebc9b180322ebb46f530beca5d6
1f540c54701e3eeb34cb619a3a4eb18f1ac70ef2dJordan Rose//===--- ASTContext.cpp - Context to hold long-lived AST nodes ------------===// 2740d490593e0de8732a697c9f77b90ddd463863bJordan Rose// 3740d490593e0de8732a697c9f77b90ddd463863bJordan Rose// The LLVM Compiler Infrastructure 4740d490593e0de8732a697c9f77b90ddd463863bJordan Rose// 5740d490593e0de8732a697c9f77b90ddd463863bJordan Rose// This file is distributed under the University of Illinois Open Source 6740d490593e0de8732a697c9f77b90ddd463863bJordan Rose// License. See LICENSE.TXT for details. 7740d490593e0de8732a697c9f77b90ddd463863bJordan Rose// 8740d490593e0de8732a697c9f77b90ddd463863bJordan Rose//===----------------------------------------------------------------------===// 9740d490593e0de8732a697c9f77b90ddd463863bJordan Rose// 10740d490593e0de8732a697c9f77b90ddd463863bJordan Rose// This file implements the ASTContext interface. 11740d490593e0de8732a697c9f77b90ddd463863bJordan Rose// 12740d490593e0de8732a697c9f77b90ddd463863bJordan Rose//===----------------------------------------------------------------------===// 13740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 14740d490593e0de8732a697c9f77b90ddd463863bJordan Rose#include "clang/AST/ASTContext.h" 15740d490593e0de8732a697c9f77b90ddd463863bJordan Rose#include "clang/AST/CharUnits.h" 16740d490593e0de8732a697c9f77b90ddd463863bJordan Rose#include "clang/AST/DeclCXX.h" 17740d490593e0de8732a697c9f77b90ddd463863bJordan Rose#include "clang/AST/DeclObjC.h" 18740d490593e0de8732a697c9f77b90ddd463863bJordan Rose#include "clang/AST/DeclTemplate.h" 19740d490593e0de8732a697c9f77b90ddd463863bJordan Rose#include "clang/AST/TypeLoc.h" 20740d490593e0de8732a697c9f77b90ddd463863bJordan Rose#include "clang/AST/Expr.h" 21740d490593e0de8732a697c9f77b90ddd463863bJordan Rose#include "clang/AST/ExternalASTSource.h" 22740d490593e0de8732a697c9f77b90ddd463863bJordan Rose#include "clang/AST/RecordLayout.h" 23de507eaf3cb54d3cb234dc14499c10ab3373d15fJordan Rose#include "clang/Basic/Builtins.h" 24740d490593e0de8732a697c9f77b90ddd463863bJordan Rose#include "clang/Basic/SourceManager.h" 25b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose#include "clang/Basic/TargetInfo.h" 26740d490593e0de8732a697c9f77b90ddd463863bJordan Rose#include "llvm/ADT/SmallString.h" 27740d490593e0de8732a697c9f77b90ddd463863bJordan Rose#include "llvm/ADT/StringExtras.h" 2828038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose#include "llvm/Support/MathExtras.h" 2928038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose#include "llvm/Support/raw_ostream.h" 3028038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose#include "RecordLayoutBuilder.h" 31740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 32740d490593e0de8732a697c9f77b90ddd463863bJordan Roseusing namespace clang; 33740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 34740d490593e0de8732a697c9f77b90ddd463863bJordan Roseenum FloatingRank { 35740d490593e0de8732a697c9f77b90ddd463863bJordan Rose FloatRank, DoubleRank, LongDoubleRank 36740d490593e0de8732a697c9f77b90ddd463863bJordan Rose}; 37740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 38645baeed6800f952e9ad1d5666e01080385531a2Jordan RoseASTContext::ASTContext(const LangOptions& LOpts, SourceManager &SM, 39645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose const TargetInfo &t, 408d276d38c258dfc572586daf6c0e8f8fce249c0eJordan Rose IdentifierTable &idents, SelectorTable &sels, 41645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose Builtin::Context &builtins, 42645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose bool FreeMem, unsigned size_reserve) : 43645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose GlobalNestedNameSpecifier(0), CFConstantStringTypeDecl(0), 4470cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose ObjCFastEnumerationStateTypeDecl(0), FILEDecl(0), jmp_bufDecl(0), 45740d490593e0de8732a697c9f77b90ddd463863bJordan Rose sigjmp_bufDecl(0), BlockDescriptorType(0), BlockDescriptorExtendedType(0), 4670cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose SourceMgr(SM), LangOpts(LOpts), 478919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose LoadedExternalComments(false), FreeMemory(FreeMem), Target(t), 48740d490593e0de8732a697c9f77b90ddd463863bJordan Rose Idents(idents), Selectors(sels), 49740d490593e0de8732a697c9f77b90ddd463863bJordan Rose BuiltinInfo(builtins), ExternalSource(0), PrintingPolicy(LOpts) { 50972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose ObjCIdRedefinitionType = QualType(); 51d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose ObjCClassRedefinitionType = QualType(); 52972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose ObjCSelRedefinitionType = QualType(); 53d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose if (size_reserve > 0) Types.reserve(size_reserve); 54d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose TUDecl = TranslationUnitDecl::Create(*this); 55d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose InitBuiltinTypes(); 56d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose} 57d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose 58d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan RoseASTContext::~ASTContext() { 59d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose if (FreeMemory) { 60d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // Deallocate all the types. 61d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose while (!Types.empty()) { 6257c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose Types.back()->Destroy(*this); 6357c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose Types.pop_back(); 6457c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose } 6557c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose 6657c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose for (llvm::FoldingSet<ExtQuals>::iterator 6757c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose I = ExtQualNodes.begin(), E = ExtQualNodes.end(); I != E; ) { 6857c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose // Increment in loop to prevent using deallocated memory. 69d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose Deallocate(&*I++); 70b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose } 715960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks } 72fc05decf08feefd2ffe8cc250219aee6eab3119cAnna Zaks 735960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks for (llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*>::iterator 745960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks I = ASTRecordLayouts.begin(), E = ASTRecordLayouts.end(); I != E; ) { 75fc05decf08feefd2ffe8cc250219aee6eab3119cAnna Zaks // Increment in loop to prevent using deallocated memory. 765960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second); 775960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks delete R; 785960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks } 795960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks 80fc05decf08feefd2ffe8cc250219aee6eab3119cAnna Zaks for (llvm::DenseMap<const ObjCContainerDecl*, 815960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks const ASTRecordLayout*>::iterator 82fc05decf08feefd2ffe8cc250219aee6eab3119cAnna Zaks I = ObjCLayouts.begin(), E = ObjCLayouts.end(); I != E; ) { 83fc05decf08feefd2ffe8cc250219aee6eab3119cAnna Zaks // Increment in loop to prevent using deallocated memory. 84fc05decf08feefd2ffe8cc250219aee6eab3119cAnna Zaks ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second); 85fc05decf08feefd2ffe8cc250219aee6eab3119cAnna Zaks delete R; 865960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks } 875960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks 885960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks // Destroy nested-name-specifiers. 89e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks for (llvm::FoldingSet<NestedNameSpecifier>::iterator 90e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks NNS = NestedNameSpecifiers.begin(), 91740d490593e0de8732a697c9f77b90ddd463863bJordan Rose NNSEnd = NestedNameSpecifiers.end(); 92740d490593e0de8732a697c9f77b90ddd463863bJordan Rose NNS != NNSEnd; ) { 93972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose // Increment in loop to prevent using deallocated memory. 94972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose (*NNS++).Destroy(*this); 95972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose } 96972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose 97972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose if (GlobalNestedNameSpecifier) 98972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose GlobalNestedNameSpecifier->Destroy(*this); 99972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose 100740d490593e0de8732a697c9f77b90ddd463863bJordan Rose TUDecl->Destroy(*this); 101740d490593e0de8732a697c9f77b90ddd463863bJordan Rose} 102740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 103740d490593e0de8732a697c9f77b90ddd463863bJordan Rosevoid 104b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan RoseASTContext::setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source) { 1057c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose ExternalSource.reset(Source.take()); 1067c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose} 107b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose 108b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rosevoid ASTContext::PrintStats() const { 109972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose fprintf(stderr, "*** AST Context Stats:\n"); 1107c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose fprintf(stderr, " %d types total.\n", (int)Types.size()); 1117c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose 112740d490593e0de8732a697c9f77b90ddd463863bJordan Rose unsigned counts[] = { 113b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose#define TYPE(Name, Parent) 0, 114b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose#define ABSTRACT_TYPE(Name, Parent) 115972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose#include "clang/AST/TypeNodes.def" 116972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose 0 // Extra 117972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose }; 118972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose 119b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose for (unsigned i = 0, e = Types.size(); i != e; ++i) { 120b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose Type *T = Types[i]; 121972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose counts[(unsigned)T->getTypeClass()]++; 122972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose } 123972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose 124972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose unsigned Idx = 0; 125972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose unsigned TotalBytes = 0; 126972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose#define TYPE(Name, Parent) \ 127972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose if (counts[Idx]) \ 128972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose fprintf(stderr, " %d %s types\n", (int)counts[Idx], #Name); \ 129d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose TotalBytes += counts[Idx] * sizeof(Name##Type); \ 130d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose ++Idx; 1317c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose#define ABSTRACT_TYPE(Name, Parent) 132972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose#include "clang/AST/TypeNodes.def" 133b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose 1347c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose fprintf(stderr, "Total bytes = %d\n", int(TotalBytes)); 135972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose 136972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose if (ExternalSource.get()) { 137972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose fprintf(stderr, "\n"); 138972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose ExternalSource->PrintStats(); 139972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose } 140972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose} 141b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose 142d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose 1437c99aa385178c630e29f671299cdd9c104f1c885Jordan Rosevoid ASTContext::InitBuiltinType(CanQualType &R, BuiltinType::Kind K) { 1447c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose BuiltinType *Ty = new (*this, TypeAlignment) BuiltinType(K); 145b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose R = CanQualType::CreateUnsafe(QualType(Ty, 0)); 146b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose Types.push_back(Ty); 147b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose} 1487c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose 149b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rosevoid ASTContext::InitBuiltinTypes() { 150740d490593e0de8732a697c9f77b90ddd463863bJordan Rose assert(VoidTy.isNull() && "Context reinitialized?"); 151740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 152972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose // C99 6.2.5p19. 153972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose InitBuiltinType(VoidTy, BuiltinType::Void); 154972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose 155740d490593e0de8732a697c9f77b90ddd463863bJordan Rose // C99 6.2.5p2. 156740d490593e0de8732a697c9f77b90ddd463863bJordan Rose InitBuiltinType(BoolTy, BuiltinType::Bool); 157b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose // C99 6.2.5p3. 158740d490593e0de8732a697c9f77b90ddd463863bJordan Rose if (LangOpts.CharIsSigned) 159740d490593e0de8732a697c9f77b90ddd463863bJordan Rose InitBuiltinType(CharTy, BuiltinType::Char_S); 160972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose else 161740d490593e0de8732a697c9f77b90ddd463863bJordan Rose InitBuiltinType(CharTy, BuiltinType::Char_U); 162740d490593e0de8732a697c9f77b90ddd463863bJordan Rose // C99 6.2.5p4. 163740d490593e0de8732a697c9f77b90ddd463863bJordan Rose InitBuiltinType(SignedCharTy, BuiltinType::SChar); 164740d490593e0de8732a697c9f77b90ddd463863bJordan Rose InitBuiltinType(ShortTy, BuiltinType::Short); 1657c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose InitBuiltinType(IntTy, BuiltinType::Int); 166740d490593e0de8732a697c9f77b90ddd463863bJordan Rose InitBuiltinType(LongTy, BuiltinType::Long); 1677c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose InitBuiltinType(LongLongTy, BuiltinType::LongLong); 168740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 169740d490593e0de8732a697c9f77b90ddd463863bJordan Rose // C99 6.2.5p6. 1707c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose InitBuiltinType(UnsignedCharTy, BuiltinType::UChar); 1717c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose InitBuiltinType(UnsignedShortTy, BuiltinType::UShort); 172b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose InitBuiltinType(UnsignedIntTy, BuiltinType::UInt); 1737c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose InitBuiltinType(UnsignedLongTy, BuiltinType::ULong); 174b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose InitBuiltinType(UnsignedLongLongTy, BuiltinType::ULongLong); 175740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 176740d490593e0de8732a697c9f77b90ddd463863bJordan Rose // C99 6.2.5p10. 1777c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose InitBuiltinType(FloatTy, BuiltinType::Float); 1787c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose InitBuiltinType(DoubleTy, BuiltinType::Double); 1797c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose InitBuiltinType(LongDoubleTy, BuiltinType::LongDouble); 180740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 181ee158bc29bc12ce544996f7cdfde14aba63acf4dJordan Rose // GNU extension, 128-bit integers. 1825960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks InitBuiltinType(Int128Ty, BuiltinType::Int128); 183e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks InitBuiltinType(UnsignedInt128Ty, BuiltinType::UInt128); 184ee158bc29bc12ce544996f7cdfde14aba63acf4dJordan Rose 185740d490593e0de8732a697c9f77b90ddd463863bJordan Rose if (LangOpts.CPlusPlus) // C++ 3.9.1p5 186740d490593e0de8732a697c9f77b90ddd463863bJordan Rose InitBuiltinType(WCharTy, BuiltinType::WChar); 187b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose else // C99 188b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose WCharTy = getFromTargetType(Target.getWCharType()); 189b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose 190740d490593e0de8732a697c9f77b90ddd463863bJordan Rose if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 191740d490593e0de8732a697c9f77b90ddd463863bJordan Rose InitBuiltinType(Char16Ty, BuiltinType::Char16); 192740d490593e0de8732a697c9f77b90ddd463863bJordan Rose else // C99 193740d490593e0de8732a697c9f77b90ddd463863bJordan Rose Char16Ty = getFromTargetType(Target.getChar16Type()); 194740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 195740d490593e0de8732a697c9f77b90ddd463863bJordan Rose if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 1967c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose InitBuiltinType(Char32Ty, BuiltinType::Char32); 197740d490593e0de8732a697c9f77b90ddd463863bJordan Rose else // C99 198740d490593e0de8732a697c9f77b90ddd463863bJordan Rose Char32Ty = getFromTargetType(Target.getChar32Type()); 199740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 200740d490593e0de8732a697c9f77b90ddd463863bJordan Rose // Placeholder type for functions. 201740d490593e0de8732a697c9f77b90ddd463863bJordan Rose InitBuiltinType(OverloadTy, BuiltinType::Overload); 202740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 203740d490593e0de8732a697c9f77b90ddd463863bJordan Rose // Placeholder type for type-dependent expressions whose type is 204740d490593e0de8732a697c9f77b90ddd463863bJordan Rose // completely unknown. No code should ever check a type against 205740d490593e0de8732a697c9f77b90ddd463863bJordan Rose // DependentTy and users should never see it; however, it is here to 206740d490593e0de8732a697c9f77b90ddd463863bJordan Rose // help diagnose failures to properly check for type-dependent 207b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose // expressions. 208740d490593e0de8732a697c9f77b90ddd463863bJordan Rose InitBuiltinType(DependentTy, BuiltinType::Dependent); 209740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 210740d490593e0de8732a697c9f77b90ddd463863bJordan Rose // Placeholder type for C++0x auto declarations whose real type has 211740d490593e0de8732a697c9f77b90ddd463863bJordan Rose // not yet been deduced. 212740d490593e0de8732a697c9f77b90ddd463863bJordan Rose InitBuiltinType(UndeducedAutoTy, BuiltinType::UndeducedAuto); 213740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 214740d490593e0de8732a697c9f77b90ddd463863bJordan Rose // C99 6.2.5p11. 215740d490593e0de8732a697c9f77b90ddd463863bJordan Rose FloatComplexTy = getComplexType(FloatTy); 216740d490593e0de8732a697c9f77b90ddd463863bJordan Rose DoubleComplexTy = getComplexType(DoubleTy); 217740d490593e0de8732a697c9f77b90ddd463863bJordan Rose LongDoubleComplexTy = getComplexType(LongDoubleTy); 218740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 219de507eaf3cb54d3cb234dc14499c10ab3373d15fJordan Rose BuiltinVaListType = QualType(); 220de507eaf3cb54d3cb234dc14499c10ab3373d15fJordan Rose 2217c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose // "Builtin" typedefs set by Sema::ActOnTranslationUnitScope(). 2227c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose ObjCIdTypedefType = QualType(); 2237c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose ObjCClassTypedefType = QualType(); 224de507eaf3cb54d3cb234dc14499c10ab3373d15fJordan Rose ObjCSelTypedefType = QualType(); 225740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 2267c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose // Builtin types for 'id', 'Class', and 'SEL'. 227740d490593e0de8732a697c9f77b90ddd463863bJordan Rose InitBuiltinType(ObjCBuiltinIdTy, BuiltinType::ObjCId); 228740d490593e0de8732a697c9f77b90ddd463863bJordan Rose InitBuiltinType(ObjCBuiltinClassTy, BuiltinType::ObjCClass); 229740d490593e0de8732a697c9f77b90ddd463863bJordan Rose InitBuiltinType(ObjCBuiltinSelTy, BuiltinType::ObjCSel); 2307c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose 231740d490593e0de8732a697c9f77b90ddd463863bJordan Rose ObjCConstantStringType = QualType(); 232740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 2337c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose // void * type 234740d490593e0de8732a697c9f77b90ddd463863bJordan Rose VoidPtrTy = getPointerType(VoidTy); 2357c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose 236740d490593e0de8732a697c9f77b90ddd463863bJordan Rose // nullptr type (C++0x 2.14.7) 237740d490593e0de8732a697c9f77b90ddd463863bJordan Rose InitBuiltinType(NullPtrTy, BuiltinType::NullPtr); 238740d490593e0de8732a697c9f77b90ddd463863bJordan Rose} 239740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 240740d490593e0de8732a697c9f77b90ddd463863bJordan RoseMemberSpecializationInfo * 241740d490593e0de8732a697c9f77b90ddd463863bJordan RoseASTContext::getInstantiatedFromStaticDataMember(const VarDecl *Var) { 242740d490593e0de8732a697c9f77b90ddd463863bJordan Rose assert(Var->isStaticDataMember() && "Not a static data member"); 24385d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *>::iterator Pos 24485d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose = InstantiatedFromStaticDataMember.find(Var); 24585d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose if (Pos == InstantiatedFromStaticDataMember.end()) 24685d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose return 0; 24785d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose 2487c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose return Pos->second; 2497c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose} 2507c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose 25185d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rosevoid 25228038f33aa2db4833881fea757a1f0daf85ac02bJordan RoseASTContext::setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 2538d276d38c258dfc572586daf6c0e8f8fce249c0eJordan Rose TemplateSpecializationKind TSK) { 25428038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose assert(Inst->isStaticDataMember() && "Not a static data member"); 25528038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose assert(Tmpl->isStaticDataMember() && "Not a static data member"); 256740d490593e0de8732a697c9f77b90ddd463863bJordan Rose assert(!InstantiatedFromStaticDataMember[Inst] && 257740d490593e0de8732a697c9f77b90ddd463863bJordan Rose "Already noted what static data member was instantiated from"); 258740d490593e0de8732a697c9f77b90ddd463863bJordan Rose InstantiatedFromStaticDataMember[Inst] 259740d490593e0de8732a697c9f77b90ddd463863bJordan Rose = new (*this) MemberSpecializationInfo(Tmpl, TSK); 260740d490593e0de8732a697c9f77b90ddd463863bJordan Rose} 261740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 262740d490593e0de8732a697c9f77b90ddd463863bJordan RoseNamedDecl * 263ef15831780b705475e7b237ac16418e9b53cb7a6Jordan RoseASTContext::getInstantiatedFromUsingDecl(UsingDecl *UUD) { 264ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose llvm::DenseMap<UsingDecl *, NamedDecl *>::const_iterator Pos 265ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose = InstantiatedFromUsingDecl.find(UUD); 266ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose if (Pos == InstantiatedFromUsingDecl.end()) 267ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose return 0; 268ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose 269ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose return Pos->second; 270ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose} 271972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose 272972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rosevoid 273d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan RoseASTContext::setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern) { 274972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose assert((isa<UsingDecl>(Pattern) || 275972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose isa<UnresolvedUsingValueDecl>(Pattern) || 276d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose isa<UnresolvedUsingTypenameDecl>(Pattern)) && 277972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose "pattern decl is not a using decl"); 278972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose assert(!InstantiatedFromUsingDecl[Inst] && "pattern already exists"); 279972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose InstantiatedFromUsingDecl[Inst] = Pattern; 28085d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose} 28185d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose 2827c99aa385178c630e29f671299cdd9c104f1c885Jordan RoseUsingShadowDecl * 2837c99aa385178c630e29f671299cdd9c104f1c885Jordan RoseASTContext::getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst) { 2847c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*>::const_iterator Pos 28585d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose = InstantiatedFromUsingShadowDecl.find(Inst); 28685d7e01cf639b257d70f8a129709a2d7594d7b22Jordan Rose if (Pos == InstantiatedFromUsingShadowDecl.end()) 287e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose return 0; 288740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 289740d490593e0de8732a697c9f77b90ddd463863bJordan Rose return Pos->second; 290740d490593e0de8732a697c9f77b90ddd463863bJordan Rose} 291740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 292e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rosevoid 293e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan RoseASTContext::setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 294e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose UsingShadowDecl *Pattern) { 295e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose assert(!InstantiatedFromUsingShadowDecl[Inst] && "pattern already exists"); 296e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose InstantiatedFromUsingShadowDecl[Inst] = Pattern; 297e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose} 298e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose 299e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan RoseFieldDecl *ASTContext::getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field) { 300e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose llvm::DenseMap<FieldDecl *, FieldDecl *>::iterator Pos 301e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose = InstantiatedFromUnnamedFieldDecl.find(Field); 302e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose if (Pos == InstantiatedFromUnnamedFieldDecl.end()) 303e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose return 0; 304e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose 305e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose return Pos->second; 306e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose} 307e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose 308ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rosevoid ASTContext::setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, 309e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose FieldDecl *Tmpl) { 310ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose assert(!Inst->getDeclName() && "Instantiated field decl is not unnamed"); 311e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose assert(!Tmpl->getDeclName() && "Template field decl is not unnamed"); 312740d490593e0de8732a697c9f77b90ddd463863bJordan Rose assert(!InstantiatedFromUnnamedFieldDecl[Inst] && 313740d490593e0de8732a697c9f77b90ddd463863bJordan Rose "Already noted what unnamed field was instantiated from"); 314740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 315e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose InstantiatedFromUnnamedFieldDecl[Inst] = Tmpl; 316e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose} 317e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose 318e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rosenamespace { 319e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose class BeforeInTranslationUnit 320740d490593e0de8732a697c9f77b90ddd463863bJordan Rose : std::binary_function<SourceRange, SourceRange, bool> { 321740d490593e0de8732a697c9f77b90ddd463863bJordan Rose SourceManager *SourceMgr; 322740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 323740d490593e0de8732a697c9f77b90ddd463863bJordan Rose public: 324e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose explicit BeforeInTranslationUnit(SourceManager *SM) : SourceMgr(SM) { } 325740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 326740d490593e0de8732a697c9f77b90ddd463863bJordan Rose bool operator()(SourceRange X, SourceRange Y) { 327740d490593e0de8732a697c9f77b90ddd463863bJordan Rose return SourceMgr->isBeforeInTranslationUnit(X.getBegin(), Y.getBegin()); 328740d490593e0de8732a697c9f77b90ddd463863bJordan Rose } 3290ffbfd1a7f80f9a3c07317cb8f44c562f2ba1ba5Jordan Rose }; 330b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose} 3310ffbfd1a7f80f9a3c07317cb8f44c562f2ba1ba5Jordan Rose 3320ffbfd1a7f80f9a3c07317cb8f44c562f2ba1ba5Jordan Rose/// \brief Determine whether the given comment is a Doxygen-style comment. 333740d490593e0de8732a697c9f77b90ddd463863bJordan Rose/// 334740d490593e0de8732a697c9f77b90ddd463863bJordan Rose/// \param Start the start of the comment text. 335740d490593e0de8732a697c9f77b90ddd463863bJordan Rose/// 336b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose/// \param End the end of the comment text. 337740d490593e0de8732a697c9f77b90ddd463863bJordan Rose/// 338740d490593e0de8732a697c9f77b90ddd463863bJordan Rose/// \param Member whether we want to check whether this is a member comment 339740d490593e0de8732a697c9f77b90ddd463863bJordan Rose/// (which requires a < after the Doxygen-comment delimiter). Otherwise, 340740d490593e0de8732a697c9f77b90ddd463863bJordan Rose/// we only return true when we find a non-member comment. 341b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rosestatic bool 3427c99aa385178c630e29f671299cdd9c104f1c885Jordan RoseisDoxygenComment(SourceManager &SourceMgr, SourceRange Comment, 3437c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose bool Member = false) { 344b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose const char *BufferStart 3457c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose = SourceMgr.getBufferData(SourceMgr.getFileID(Comment.getBegin())).first; 3467c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose const char *Start = BufferStart + SourceMgr.getFileOffset(Comment.getBegin()); 347972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose const char* End = BufferStart + SourceMgr.getFileOffset(Comment.getEnd()); 348740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 3497c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose if (End - Start < 4) 350740d490593e0de8732a697c9f77b90ddd463863bJordan Rose return false; 351740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 352b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose assert(Start[0] == '/' && "Not a comment?"); 353b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose if (Start[1] == '*' && !(Start[2] == '!' || Start[2] == '*')) 3547c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose return false; 3557c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose if (Start[1] == '/' && !(Start[2] == '!' || Start[2] == '/')) 356b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose return false; 357740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 358e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks return (Start[3] == '<') == Member; 359ee158bc29bc12ce544996f7cdfde14aba63acf4dJordan Rose} 360ee158bc29bc12ce544996f7cdfde14aba63acf4dJordan Rose 361ee158bc29bc12ce544996f7cdfde14aba63acf4dJordan Rose/// \brief Retrieve the comment associated with the given declaration, if 3625960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks/// it has one. 363e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaksconst char *ASTContext::getCommentForDecl(const Decl *D) { 364ee158bc29bc12ce544996f7cdfde14aba63acf4dJordan Rose if (!D) 365ee158bc29bc12ce544996f7cdfde14aba63acf4dJordan Rose return 0; 3667c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose 367b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose // Check whether we have cached a comment string for this declaration 368ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose // already. 369ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose llvm::DenseMap<const Decl *, std::string>::iterator Pos 370ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose = DeclComments.find(D); 371ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose if (Pos != DeclComments.end()) 372ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose return Pos->second.c_str(); 373b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose 374740d490593e0de8732a697c9f77b90ddd463863bJordan Rose // If we have an external AST source and have not yet loaded comments from 375740d490593e0de8732a697c9f77b90ddd463863bJordan Rose // that source, do so now. 376740d490593e0de8732a697c9f77b90ddd463863bJordan Rose if (ExternalSource && !LoadedExternalComments) { 377740d490593e0de8732a697c9f77b90ddd463863bJordan Rose std::vector<SourceRange> LoadedComments; 378740d490593e0de8732a697c9f77b90ddd463863bJordan Rose ExternalSource->ReadComments(LoadedComments); 379740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 380645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose if (!LoadedComments.empty()) 381740d490593e0de8732a697c9f77b90ddd463863bJordan Rose Comments.insert(Comments.begin(), LoadedComments.begin(), 382740d490593e0de8732a697c9f77b90ddd463863bJordan Rose LoadedComments.end()); 383b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose 3847c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose LoadedExternalComments = true; 385972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose } 386972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose 387740d490593e0de8732a697c9f77b90ddd463863bJordan Rose // If there are no comments anywhere, we won't find anything. 388740d490593e0de8732a697c9f77b90ddd463863bJordan Rose if (Comments.empty()) 3897c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose return 0; 390b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose 391b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose // If the declaration doesn't map directly to a location in a file, we 392740d490593e0de8732a697c9f77b90ddd463863bJordan Rose // can't find the comment. 3937c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose SourceLocation DeclStartLoc = D->getLocStart(); 394740d490593e0de8732a697c9f77b90ddd463863bJordan Rose if (DeclStartLoc.isInvalid() || !DeclStartLoc.isFileID()) 3957c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose return 0; 3967c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose 3977c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose // Find the comment that occurs just before this declaration. 398b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose std::vector<SourceRange>::iterator LastComment 399740d490593e0de8732a697c9f77b90ddd463863bJordan Rose = std::lower_bound(Comments.begin(), Comments.end(), 400740d490593e0de8732a697c9f77b90ddd463863bJordan Rose SourceRange(DeclStartLoc), 401740d490593e0de8732a697c9f77b90ddd463863bJordan Rose BeforeInTranslationUnit(&SourceMgr)); 402740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 403740d490593e0de8732a697c9f77b90ddd463863bJordan Rose // Decompose the location for the start of the declaration and find the 404740d490593e0de8732a697c9f77b90ddd463863bJordan Rose // beginning of the file buffer. 405740d490593e0de8732a697c9f77b90ddd463863bJordan Rose std::pair<FileID, unsigned> DeclStartDecomp 406740d490593e0de8732a697c9f77b90ddd463863bJordan Rose = SourceMgr.getDecomposedLoc(DeclStartLoc); 407740d490593e0de8732a697c9f77b90ddd463863bJordan Rose const char *FileBufferStart 408740d490593e0de8732a697c9f77b90ddd463863bJordan Rose = SourceMgr.getBufferData(DeclStartDecomp.first).first; 409740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 410740d490593e0de8732a697c9f77b90ddd463863bJordan Rose // First check whether we have a comment for a member. 411d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose if (LastComment != Comments.end() && 412972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose !isa<TagDecl>(D) && !isa<NamespaceDecl>(D) && 413d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose isDoxygenComment(SourceMgr, *LastComment, true)) { 414740d490593e0de8732a697c9f77b90ddd463863bJordan Rose std::pair<FileID, unsigned> LastCommentEndDecomp 415740d490593e0de8732a697c9f77b90ddd463863bJordan Rose = SourceMgr.getDecomposedLoc(LastComment->getEnd()); 4167c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose if (DeclStartDecomp.first == LastCommentEndDecomp.first && 417740d490593e0de8732a697c9f77b90ddd463863bJordan Rose SourceMgr.getLineNumber(DeclStartDecomp.first, DeclStartDecomp.second) 418d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose == SourceMgr.getLineNumber(LastCommentEndDecomp.first, 419d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose LastCommentEndDecomp.second)) { 420d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // The Doxygen member comment comes after the declaration starts and 421d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // is on the same line and in the same file as the declaration. This 4227c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose // is the comment we want. 423b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose std::string &Result = DeclComments[D]; 424740d490593e0de8732a697c9f77b90ddd463863bJordan Rose Result.append(FileBufferStart + 425740d490593e0de8732a697c9f77b90ddd463863bJordan Rose SourceMgr.getFileOffset(LastComment->getBegin()), 426740d490593e0de8732a697c9f77b90ddd463863bJordan Rose FileBufferStart + LastCommentEndDecomp.second + 1); 427740d490593e0de8732a697c9f77b90ddd463863bJordan Rose return Result.c_str(); 428740d490593e0de8732a697c9f77b90ddd463863bJordan Rose } 429645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose } 430645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose 431645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose if (LastComment == Comments.begin()) 432645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose return 0; 433645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose --LastComment; 434645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose 435645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose // Decompose the end of the comment. 436645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose std::pair<FileID, unsigned> LastCommentEndDecomp 437645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose = SourceMgr.getDecomposedLoc(LastComment->getEnd()); 438645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose 439645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose // If the comment and the declaration aren't in the same file, then they 440645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose // aren't related. 441645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose if (DeclStartDecomp.first != LastCommentEndDecomp.first) 442645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose return 0; 443645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose 444645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose // Check that we actually have a Doxygen comment. 445645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose if (!isDoxygenComment(SourceMgr, *LastComment)) 446645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose return 0; 447645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose 448645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose // Compute the starting line for the declaration and for the end of the 449645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose // comment (this is expensive). 450645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose unsigned DeclStartLine 451645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose = SourceMgr.getLineNumber(DeclStartDecomp.first, DeclStartDecomp.second); 452645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose unsigned CommentEndLine 453645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose = SourceMgr.getLineNumber(LastCommentEndDecomp.first, 454645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose LastCommentEndDecomp.second); 455645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose 456645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose // If the comment does not end on the line prior to the declaration, then 457645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose // the comment is not associated with the declaration at all. 458645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose if (CommentEndLine + 1 != DeclStartLine) 459645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose return 0; 460645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose 461645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose // We have a comment, but there may be more comments on the previous lines. 462645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose // Keep looking so long as the comments are still Doxygen comments and are 463645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose // still adjacent. 464645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose unsigned ExpectedLine 465645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose = SourceMgr.getSpellingLineNumber(LastComment->getBegin()) - 1; 466645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose std::vector<SourceRange>::iterator FirstComment = LastComment; 467645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose while (FirstComment != Comments.begin()) { 468645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose // Look at the previous comment 469645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose --FirstComment; 470645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose std::pair<FileID, unsigned> Decomp 471645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose = SourceMgr.getDecomposedLoc(FirstComment->getEnd()); 472645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose 473645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose // If this previous comment is in a different file, we're done. 474645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose if (Decomp.first != DeclStartDecomp.first) { 475645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose ++FirstComment; 476645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose break; 477645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose } 478645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose 479645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose // If this comment is not a Doxygen comment, we're done. 480645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose if (!isDoxygenComment(SourceMgr, *FirstComment)) { 481c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose ++FirstComment; 482c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose break; 483645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose } 484740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 4857c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose // If the line number is not what we expected, we're done. 486740d490593e0de8732a697c9f77b90ddd463863bJordan Rose unsigned Line = SourceMgr.getLineNumber(Decomp.first, Decomp.second); 487c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose if (Line != ExpectedLine) { 4887c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose ++FirstComment; 489645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose break; 490645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose } 491645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose 492645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose // Set the next expected line number. 493645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose ExpectedLine 494c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose = SourceMgr.getSpellingLineNumber(FirstComment->getBegin()) - 1; 495645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose } 496972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose 497c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose // The iterator range [FirstComment, LastComment] contains all of the 4989da59a67a27a4d3fc9d59552f07808a32f85e9d3Jordan Rose // BCPL comments that, together, are associated with this declaration. 499645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose // Form a single comment block string for this declaration that concatenates 5009da59a67a27a4d3fc9d59552f07808a32f85e9d3Jordan Rose // all of these comments. 501ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose std::string &Result = DeclComments[D]; 502645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose while (FirstComment != LastComment) { 5039da59a67a27a4d3fc9d59552f07808a32f85e9d3Jordan Rose std::pair<FileID, unsigned> DecompStart 5049da59a67a27a4d3fc9d59552f07808a32f85e9d3Jordan Rose = SourceMgr.getDecomposedLoc(FirstComment->getBegin()); 5059da59a67a27a4d3fc9d59552f07808a32f85e9d3Jordan Rose std::pair<FileID, unsigned> DecompEnd 5069da59a67a27a4d3fc9d59552f07808a32f85e9d3Jordan Rose = SourceMgr.getDecomposedLoc(FirstComment->getEnd()); 5079da59a67a27a4d3fc9d59552f07808a32f85e9d3Jordan Rose Result.append(FileBufferStart + DecompStart.second, 5089da59a67a27a4d3fc9d59552f07808a32f85e9d3Jordan Rose FileBufferStart + DecompEnd.second + 1); 509ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose ++FirstComment; 510645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose } 511645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose 512e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks // Append the last comment line. 513c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose Result.append(FileBufferStart + 514ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose SourceMgr.getFileOffset(LastComment->getBegin()), 515ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose FileBufferStart + LastCommentEndDecomp.second + 1); 516ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose return Result.c_str(); 517c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose} 518c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose 519c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose//===----------------------------------------------------------------------===// 520c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose// Type Sizing and Analysis 521c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose//===----------------------------------------------------------------------===// 522c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose 523c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 524c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose/// scalar floating point type. 525c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Roseconst llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 526c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose const BuiltinType *BT = T->getAs<BuiltinType>(); 527d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose assert(BT && "Not a floating point type!"); 528972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose switch (BT->getKind()) { 529d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose default: assert(0 && "Not a floating point type!"); 530740d490593e0de8732a697c9f77b90ddd463863bJordan Rose case BuiltinType::Float: return Target.getFloatFormat(); 531c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose case BuiltinType::Double: return Target.getDoubleFormat(); 5327c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose case BuiltinType::LongDouble: return Target.getLongDoubleFormat(); 533740d490593e0de8732a697c9f77b90ddd463863bJordan Rose } 534d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose} 535d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose 536d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose/// getDeclAlignInBytes - Return a conservative estimate of the alignment of the 537d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose/// specified decl. Note that bitfields do not have a valid alignment, so 5387c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose/// this method will assert on them. 539645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose/// If @p RefAsPointee, references are treated like their underlying type 540645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose/// (for alignof), else they're treated like pointers (for CodeGen). 541645baeed6800f952e9ad1d5666e01080385531a2Jordan Roseunsigned ASTContext::getDeclAlignInBytes(const Decl *D, bool RefAsPointee) { 542645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose unsigned Align = Target.getCharWidth(); 543645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose 544645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose if (const AlignedAttr* AA = D->getAttr<AlignedAttr>()) 545645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose Align = std::max(Align, AA->getMaxAlignment()); 546645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose 547645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 548645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose QualType T = VD->getType(); 549645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose if (const ReferenceType* RT = T->getAs<ReferenceType>()) { 550740d490593e0de8732a697c9f77b90ddd463863bJordan Rose if (RefAsPointee) 551740d490593e0de8732a697c9f77b90ddd463863bJordan Rose T = RT->getPointeeType(); 5529da59a67a27a4d3fc9d59552f07808a32f85e9d3Jordan Rose else 5537c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose T = getPointerType(RT->getPointeeType()); 5547c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose } 555e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose if (!T->isIncompleteType() && !T->isFunctionType()) { 556740d490593e0de8732a697c9f77b90ddd463863bJordan Rose // Incomplete or function types default to 1. 557740d490593e0de8732a697c9f77b90ddd463863bJordan Rose while (isa<VariableArrayType>(T) || isa<IncompleteArrayType>(T)) 558740d490593e0de8732a697c9f77b90ddd463863bJordan Rose T = cast<ArrayType>(T)->getElementType(); 559740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 560740d490593e0de8732a697c9f77b90ddd463863bJordan Rose Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 561fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose } 562fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose } 563fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose 564fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose return Align / Target.getCharWidth(); 565c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose} 566d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose 567d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose/// getTypeSize - Return the size of the specified type, in bits. This method 568972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose/// does not work on incomplete types. 569d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose/// 570d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose/// FIXME: Pointers into different addr spaces could have different sizes and 571d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose/// alignment requirements: getPointerInfo should take an AddrSpace, this 572d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose/// should take a QualType, &c. 573972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rosestd::pair<uint64_t, unsigned> 574972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan RoseASTContext::getTypeInfo(const Type *T) { 575972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose uint64_t Width=0; 576972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose unsigned Align=8; 577972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose switch (T->getTypeClass()) { 578972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose#define TYPE(Class, Base) 579fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose#define ABSTRACT_TYPE(Class, Base) 5807c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose#define NON_CANONICAL_TYPE(Class, Base) 581645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose#define DEPENDENT_TYPE(Class, Base) case Type::Class: 582fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose#include "clang/AST/TypeNodes.def" 583fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose assert(false && "Should not see dependent types"); 5847c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose break; 5857c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose 5867c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose case Type::FunctionNoProto: 5877c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose case Type::FunctionProto: 588fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose // GCC extension: alignof(function) = 32 bits 589fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose Width = 0; 590fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose Align = 32; 5919da59a67a27a4d3fc9d59552f07808a32f85e9d3Jordan Rose break; 5927c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose 5937c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose case Type::IncompleteArray: 594e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose case Type::VariableArray: 595fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose Width = 0; 596fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose Align = getTypeAlign(cast<ArrayType>(T)->getElementType()); 597fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose break; 598fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose 599fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose case Type::ConstantArray: { 600645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 601740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 602645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 603645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose Width = EltInfo.first*CAT->getSize().getZExtValue(); 604645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose Align = EltInfo.second; 605d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose break; 606d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose } 607740d490593e0de8732a697c9f77b90ddd463863bJordan Rose case Type::ExtVector: 608645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose case Type::Vector: { 60969f87c956b3ac2b80124fd9604af012e1061473aJordan Rose const VectorType *VT = cast<VectorType>(T); 610645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(VT->getElementType()); 611645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose Width = EltInfo.first*VT->getNumElements(); 612645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose Align = Width; 613645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose // If the alignment is not a power of 2, round up to the next power of 2. 614645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose // This happens for non-power-of-2 length vectors. 615645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose if (VT->getNumElements() & (VT->getNumElements()-1)) { 616645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose Align = llvm::NextPowerOf2(Align); 617645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose Width = llvm::RoundUpToAlignment(Width, Align); 618645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose } 619645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose break; 620645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose } 621740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 622740d490593e0de8732a697c9f77b90ddd463863bJordan Rose case Type::Builtin: 623645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose switch (cast<BuiltinType>(T)->getKind()) { 624645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose default: assert(0 && "Unknown builtin type!"); 625ee158bc29bc12ce544996f7cdfde14aba63acf4dJordan Rose case BuiltinType::Void: 626645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose // GCC extension: alignof(void) = 8 bits. 627645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose Width = 0; 628645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose Align = 8; 629ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose break; 630645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose 631645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose case BuiltinType::Bool: 632b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose Width = Target.getBoolWidth(); 633645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose Align = Target.getBoolAlign(); 634b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose break; 635740d490593e0de8732a697c9f77b90ddd463863bJordan Rose case BuiltinType::Char_S: 636645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose case BuiltinType::Char_U: 637740d490593e0de8732a697c9f77b90ddd463863bJordan Rose case BuiltinType::UChar: 638740d490593e0de8732a697c9f77b90ddd463863bJordan Rose case BuiltinType::SChar: 639740d490593e0de8732a697c9f77b90ddd463863bJordan Rose Width = Target.getCharWidth(); 640740d490593e0de8732a697c9f77b90ddd463863bJordan Rose Align = Target.getCharAlign(); 641740d490593e0de8732a697c9f77b90ddd463863bJordan Rose break; 642740d490593e0de8732a697c9f77b90ddd463863bJordan Rose case BuiltinType::WChar: 643740d490593e0de8732a697c9f77b90ddd463863bJordan Rose Width = Target.getWCharWidth(); 644d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose Align = Target.getWCharAlign(); 645b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose break; 646d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose case BuiltinType::Char16: 647d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose Width = Target.getChar16Width(); 648d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose Align = Target.getChar16Align(); 649d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose break; 650d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose case BuiltinType::Char32: 651d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose Width = Target.getChar32Width(); 652d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose Align = Target.getChar32Align(); 653d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose break; 654b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose case BuiltinType::UShort: 655740d490593e0de8732a697c9f77b90ddd463863bJordan Rose case BuiltinType::Short: 6567c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose Width = Target.getShortWidth(); 657b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose Align = Target.getShortAlign(); 658b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose break; 659740d490593e0de8732a697c9f77b90ddd463863bJordan Rose case BuiltinType::UInt: 660d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose case BuiltinType::Int: 661d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose Width = Target.getIntWidth(); 662d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose Align = Target.getIntAlign(); 663d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose break; 664d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose case BuiltinType::ULong: 665d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose case BuiltinType::Long: 6667c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose Width = Target.getLongWidth(); 667b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose Align = Target.getLongAlign(); 668b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose break; 669b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose case BuiltinType::ULongLong: 6707c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose case BuiltinType::LongLong: 671b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose Width = Target.getLongLongWidth(); 672740d490593e0de8732a697c9f77b90ddd463863bJordan Rose Align = Target.getLongLongAlign(); 673740d490593e0de8732a697c9f77b90ddd463863bJordan Rose break; 6747c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose case BuiltinType::Int128: 675740d490593e0de8732a697c9f77b90ddd463863bJordan Rose case BuiltinType::UInt128: 6767c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose Width = 128; 677b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose Align = 128; // int128_t is 128-bit aligned on all targets. 678740d490593e0de8732a697c9f77b90ddd463863bJordan Rose break; 679740d490593e0de8732a697c9f77b90ddd463863bJordan Rose case BuiltinType::Float: 680ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose Width = Target.getFloatWidth(); 681645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose Align = Target.getFloatAlign(); 6827c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose break; 683ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose case BuiltinType::Double: 684ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose Width = Target.getDoubleWidth(); 685ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose Align = Target.getDoubleAlign(); 6867c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose break; 687e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose case BuiltinType::LongDouble: 688740d490593e0de8732a697c9f77b90ddd463863bJordan Rose Width = Target.getLongDoubleWidth(); 689740d490593e0de8732a697c9f77b90ddd463863bJordan Rose Align = Target.getLongDoubleAlign(); 690740d490593e0de8732a697c9f77b90ddd463863bJordan Rose break; 691740d490593e0de8732a697c9f77b90ddd463863bJordan Rose case BuiltinType::NullPtr: 692740d490593e0de8732a697c9f77b90ddd463863bJordan Rose Width = Target.getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t) 6930e020adcb69e91826f4ee14a0c1d381f7b624a34Jordan Rose Align = Target.getPointerAlign(0); // == sizeof(void*) 6940e020adcb69e91826f4ee14a0c1d381f7b624a34Jordan Rose break; 6950e020adcb69e91826f4ee14a0c1d381f7b624a34Jordan Rose } 69670cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose break; 697d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose case Type::ObjCObjectPointer: 698972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose Width = Target.getPointerWidth(0); 699d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose Align = Target.getPointerAlign(0); 700b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose break; 70170cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose case Type::BlockPointer: { 7027c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose unsigned AS = cast<BlockPointerType>(T)->getPointeeType().getAddressSpace(); 70370cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose Width = Target.getPointerWidth(AS); 704d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose Align = Target.getPointerAlign(AS); 705d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose break; 706d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose } 707d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose case Type::LValueReference: 7087c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose case Type::RValueReference: { 709b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose // alignof and sizeof should never enter this code path here, so we go 710b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose // the pointer route. 711b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose unsigned AS = cast<ReferenceType>(T)->getPointeeType().getAddressSpace(); 7127c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose Width = Target.getPointerWidth(AS); 713b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose Align = Target.getPointerAlign(AS); 71470cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose break; 71570cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose } 7167c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose case Type::Pointer: { 717b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose unsigned AS = cast<PointerType>(T)->getPointeeType().getAddressSpace(); 718b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose Width = Target.getPointerWidth(AS); 71970cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose Align = Target.getPointerAlign(AS); 7207c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose break; 72170cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose } 72270cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose case Type::MemberPointer: { 72370cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose QualType Pointee = cast<MemberPointerType>(T)->getPointeeType(); 724b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose std::pair<uint64_t, unsigned> PtrDiffInfo = 72570cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose getTypeInfo(getPointerDiffType()); 72670cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose Width = PtrDiffInfo.first; 7277c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose if (Pointee->isFunctionType()) 728b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose Width *= 2; 72970cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose Align = PtrDiffInfo.second; 73070cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose break; 73170cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose } 73270cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose case Type::Complex: { 73370cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose // Complex types have the same alignment as their elements, but twice the 7348919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose // size. 7358919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose std::pair<uint64_t, unsigned> EltInfo = 7368919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose getTypeInfo(cast<ComplexType>(T)->getElementType()); 7378919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose Width = EltInfo.first*2; 7388919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose Align = EltInfo.second; 7398919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose break; 7408919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose } 7418919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose case Type::ObjCInterface: { 7428919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 7438919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 744cde8cdbd6a662c636164465ad309b5f17ff01064Jordan Rose Width = Layout.getSize(); 7458919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose Align = Layout.getAlignment(); 7468919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose break; 747cde8cdbd6a662c636164465ad309b5f17ff01064Jordan Rose } 748d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose case Type::Record: 749d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose case Type::Enum: { 7508919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose const TagType *TT = cast<TagType>(T); 751cde8cdbd6a662c636164465ad309b5f17ff01064Jordan Rose 7528919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose if (TT->getDecl()->isInvalidDecl()) { 753d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose Width = 1; 754d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose Align = 1; 755d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose break; 756d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose } 757d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose 758d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose if (const EnumType *ET = dyn_cast<EnumType>(TT)) 759972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose return getTypeInfo(ET->getDecl()->getIntegerType()); 760972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose 761972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose const RecordType *RT = cast<RecordType>(TT); 7627c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 763740d490593e0de8732a697c9f77b90ddd463863bJordan Rose Width = Layout.getSize(); 7647c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose Align = Layout.getAlignment(); 765740d490593e0de8732a697c9f77b90ddd463863bJordan Rose break; 7663f558af01643787d209a133215b0abec81b5fe30Anna Zaks } 7673f558af01643787d209a133215b0abec81b5fe30Anna Zaks 7683f558af01643787d209a133215b0abec81b5fe30Anna Zaks case Type::SubstTemplateTypeParm: 7693f558af01643787d209a133215b0abec81b5fe30Anna Zaks return getTypeInfo(cast<SubstTemplateTypeParmType>(T)-> 770740d490593e0de8732a697c9f77b90ddd463863bJordan Rose getReplacementType().getTypePtr()); 7717c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose 7728919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose case Type::Elaborated: 773cde8cdbd6a662c636164465ad309b5f17ff01064Jordan Rose return getTypeInfo(cast<ElaboratedType>(T)->getUnderlyingType() 7747c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose .getTypePtr()); 775b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose 776b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose case Type::Typedef: { 7777c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose const TypedefDecl *Typedef = cast<TypedefType>(T)->getDecl(); 778b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose if (const AlignedAttr *Aligned = Typedef->getAttr<AlignedAttr>()) { 779b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose Align = std::max(Aligned->getMaxAlignment(), 7807c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose getTypeAlign(Typedef->getUnderlyingType().getTypePtr())); 781b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose Width = getTypeSize(Typedef->getUnderlyingType().getTypePtr()); 782b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose } else 783740d490593e0de8732a697c9f77b90ddd463863bJordan Rose return getTypeInfo(Typedef->getUnderlyingType().getTypePtr()); 7848919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose break; 7858919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose } 7868919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose 7878919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose case Type::TypeOfExpr: 7888919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType() 7898919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose .getTypePtr()); 7908919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose 7918919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose case Type::TypeOf: 7928919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr()); 7938919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose 7947c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose case Type::Decltype: 7958919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose return getTypeInfo(cast<DecltypeType>(T)->getUnderlyingExpr()->getType() 7960e020adcb69e91826f4ee14a0c1d381f7b624a34Jordan Rose .getTypePtr()); 797740d490593e0de8732a697c9f77b90ddd463863bJordan Rose 798740d490593e0de8732a697c9f77b90ddd463863bJordan Rose case Type::QualifiedName: 7990e020adcb69e91826f4ee14a0c1d381f7b624a34Jordan Rose return getTypeInfo(cast<QualifiedNameType>(T)->getNamedType().getTypePtr()); 8000e020adcb69e91826f4ee14a0c1d381f7b624a34Jordan Rose 8010e020adcb69e91826f4ee14a0c1d381f7b624a34Jordan Rose case Type::TemplateSpecialization: 8020e020adcb69e91826f4ee14a0c1d381f7b624a34Jordan Rose assert(getCanonicalType(T) != T && 803cde8cdbd6a662c636164465ad309b5f17ff01064Jordan Rose "Cannot request the size of a dependent type"); 804b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose // FIXME: this is likely to be wrong once we support template 805cde8cdbd6a662c636164465ad309b5f17ff01064Jordan Rose // aliases, since a template alias could refer to a typedef that 806cde8cdbd6a662c636164465ad309b5f17ff01064Jordan Rose // has an __aligned__ attribute on it. 8078919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose return getTypeInfo(getCanonicalType(T)); 8088919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose } 8098919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose 8108919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose assert(Align && (Align & (Align-1)) == 0 && "Alignment must be power of 2"); 8118919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose return std::make_pair(Width, Align); 8128919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose} 8138919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose 8148919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose/// getTypeSizeInChars - Return the size of the specified type, in characters. 8158919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose/// This method does not work on incomplete types. 8168919e688dc610d1f632a4d43f7f1489f67255476Jordan RoseCharUnits ASTContext::getTypeSizeInChars(QualType T) { 8178919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 8188919e688dc610d1f632a4d43f7f1489f67255476Jordan Rose} 819740d490593e0de8732a697c9f77b90ddd463863bJordan RoseCharUnits ASTContext::getTypeSizeInChars(const Type *T) { 820740d490593e0de8732a697c9f77b90ddd463863bJordan Rose return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 821e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks} 822ee158bc29bc12ce544996f7cdfde14aba63acf4dJordan Rose 823ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 824ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose/// type for the current target in bits. This can be different than the ABI 825ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose/// alignment in cases where it is beneficial for performance to overalign 826ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose/// a data type. 827ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Roseunsigned ASTContext::getPreferredTypeAlign(const Type *T) { 828b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose unsigned ABIAlign = getTypeAlign(T); 8297c99aa385178c630e29f671299cdd9c104f1c885Jordan Rose 830b7a23e05d1d8f07f2a6edce5c88c728fe894c2c7Jordan Rose // Double and long long should be naturally aligned if possible. 831740d490593e0de8732a697c9f77b90ddd463863bJordan Rose if (const ComplexType* CT = T->getAs<ComplexType>()) 832740d490593e0de8732a697c9f77b90ddd463863bJordan Rose T = CT->getElementType().getTypePtr(); 833740d490593e0de8732a697c9f77b90ddd463863bJordan Rose if (T->isSpecificBuiltinType(BuiltinType::Double) || 834740d490593e0de8732a697c9f77b90ddd463863bJordan Rose T->isSpecificBuiltinType(BuiltinType::LongLong)) 835740d490593e0de8732a697c9f77b90ddd463863bJordan Rose return std::max(ABIAlign, (unsigned)getTypeSize(T)); 836972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose 837972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose return ABIAlign; 838972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose} 839972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose 840972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rosestatic void CollectLocalObjCIvars(ASTContext *Ctx, 841972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose const ObjCInterfaceDecl *OI, 842972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose llvm::SmallVectorImpl<FieldDecl*> &Fields) { 843972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 844972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose E = OI->ivar_end(); I != E; ++I) { 845972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose ObjCIvarDecl *IVDecl = *I; 846972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose if (!IVDecl->isInvalidDecl()) 847972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose Fields.push_back(cast<FieldDecl>(IVDecl)); 848d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose } 849972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose} 850972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose 851972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rosevoid ASTContext::CollectObjCIvars(const ObjCInterfaceDecl *OI, 852972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose llvm::SmallVectorImpl<FieldDecl*> &Fields) { 853972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass()) 854972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose CollectObjCIvars(SuperClass, Fields); 855972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose CollectLocalObjCIvars(this, OI, Fields); 856972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose} 857972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose 858972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose/// ShallowCollectObjCIvars - 859972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose/// Collect all ivars, including those synthesized, in the current class. 860972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose/// 861972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rosevoid ASTContext::ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 862d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars, 863d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose bool CollectSynthesized) { 864d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 865d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose E = OI->ivar_end(); I != E; ++I) { 866d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose Ivars.push_back(*I); 867d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose } 868d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose if (CollectSynthesized) 869d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose CollectSynthesizedIvars(OI, Ivars); 870d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose} 871d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose 872d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rosevoid ASTContext::CollectProtocolSynthesizedIvars(const ObjCProtocolDecl *PD, 873d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 874d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose for (ObjCContainerDecl::prop_iterator I = PD->prop_begin(), 875d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose E = PD->prop_end(); I != E; ++I) 876d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose if (ObjCIvarDecl *Ivar = (*I)->getPropertyIvarDecl()) 877d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose Ivars.push_back(Ivar); 878972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose 879972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose // Also look into nested protocols. 880d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose for (ObjCProtocolDecl::protocol_iterator P = PD->protocol_begin(), 88157c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose E = PD->protocol_end(); P != E; ++P) 88257c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose CollectProtocolSynthesizedIvars(*P, Ivars); 88357c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose} 88457c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose 88557c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose/// CollectSynthesizedIvars - 886645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose/// This routine collect synthesized ivars for the designated class. 887d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose/// 888d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rosevoid ASTContext::CollectSynthesizedIvars(const ObjCInterfaceDecl *OI, 889d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 890d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose for (ObjCInterfaceDecl::prop_iterator I = OI->prop_begin(), 891d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose E = OI->prop_end(); I != E; ++I) { 892d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose if (ObjCIvarDecl *Ivar = (*I)->getPropertyIvarDecl()) 893d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose Ivars.push_back(Ivar); 894d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose } 895d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // Also look into interface's protocol list for properties declared 896d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // in the protocol and whose ivars are synthesized. 897d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose for (ObjCInterfaceDecl::protocol_iterator P = OI->protocol_begin(), 898d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose PE = OI->protocol_end(); P != PE; ++P) { 899d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose ObjCProtocolDecl *PD = (*P); 900d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose CollectProtocolSynthesizedIvars(PD, Ivars); 901d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose } 902d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose} 903d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose 904d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose/// CollectInheritedProtocols - Collect all protocols in current class and 905d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose/// those inherited by it. 906d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rosevoid ASTContext::CollectInheritedProtocols(const Decl *CDecl, 907d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose llvm::SmallVectorImpl<ObjCProtocolDecl*> &Protocols) { 908d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose if (const ObjCInterfaceDecl *OI = dyn_cast<ObjCInterfaceDecl>(CDecl)) { 909d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose for (ObjCInterfaceDecl::protocol_iterator P = OI->protocol_begin(), 910d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose PE = OI->protocol_end(); P != PE; ++P) { 911d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose ObjCProtocolDecl *Proto = (*P); 912d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose Protocols.push_back(Proto); 913d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 914972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose PE = Proto->protocol_end(); P != PE; ++P) 915972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose CollectInheritedProtocols(*P, Protocols); 916972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose } 917972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose 918d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // Categories of this Interface. 919972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose for (const ObjCCategoryDecl *CDeclChain = OI->getCategoryList(); 920972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose CDeclChain; CDeclChain = CDeclChain->getNextClassCategory()) 921972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose CollectInheritedProtocols(CDeclChain, Protocols); 922d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose if (ObjCInterfaceDecl *SD = OI->getSuperClass()) 923d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose while (SD) { 924d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose CollectInheritedProtocols(SD, Protocols); 925972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose SD = SD->getSuperClass(); 926972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose } 927972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose return; 928972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose } 929972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose if (const ObjCCategoryDecl *OC = dyn_cast<ObjCCategoryDecl>(CDecl)) { 930972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose for (ObjCInterfaceDecl::protocol_iterator P = OC->protocol_begin(), 931972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose PE = OC->protocol_end(); P != PE; ++P) { 932972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose ObjCProtocolDecl *Proto = (*P); 933972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose Protocols.push_back(Proto); 934972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 935972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose PE = Proto->protocol_end(); P != PE; ++P) 936972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose CollectInheritedProtocols(*P, Protocols); 937972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose } 938972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose return; 939972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose } 940972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose if (const ObjCProtocolDecl *OP = dyn_cast<ObjCProtocolDecl>(CDecl)) { 941972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose for (ObjCProtocolDecl::protocol_iterator P = OP->protocol_begin(), 942972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose PE = OP->protocol_end(); P != PE; ++P) { 943972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose ObjCProtocolDecl *Proto = (*P); 944972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose Protocols.push_back(Proto); 945972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 946972a3680bdd95f2e9d6316b391f1c47513dc78ccJordan Rose PE = Proto->protocol_end(); P != PE; ++P) 947740d490593e0de8732a697c9f77b90ddd463863bJordan Rose CollectInheritedProtocols(*P, Protocols); 948740d490593e0de8732a697c9f77b90ddd463863bJordan Rose } 949740d490593e0de8732a697c9f77b90ddd463863bJordan Rose return; 95057c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose } 95157c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose} 95257c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose 95357c033621dacd8720ac9ff65a09025f14f70e22fJordan Roseunsigned ASTContext::CountProtocolSynthesizedIvars(const ObjCProtocolDecl *PD) { 95457c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose unsigned count = 0; 95557c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose for (ObjCContainerDecl::prop_iterator I = PD->prop_begin(), 95657c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose E = PD->prop_end(); I != E; ++I) 95757c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose if ((*I)->getPropertyIvarDecl()) 95857c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose ++count; 95957c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose 96057c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose // Also look into nested protocols. 96157c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose for (ObjCProtocolDecl::protocol_iterator P = PD->protocol_begin(), 962740d490593e0de8732a697c9f77b90ddd463863bJordan Rose E = PD->protocol_end(); P != E; ++P) 963 count += CountProtocolSynthesizedIvars(*P); 964 return count; 965} 966 967unsigned ASTContext::CountSynthesizedIvars(const ObjCInterfaceDecl *OI) { 968 unsigned count = 0; 969 for (ObjCInterfaceDecl::prop_iterator I = OI->prop_begin(), 970 E = OI->prop_end(); I != E; ++I) { 971 if ((*I)->getPropertyIvarDecl()) 972 ++count; 973 } 974 // Also look into interface's protocol list for properties declared 975 // in the protocol and whose ivars are synthesized. 976 for (ObjCInterfaceDecl::protocol_iterator P = OI->protocol_begin(), 977 PE = OI->protocol_end(); P != PE; ++P) { 978 ObjCProtocolDecl *PD = (*P); 979 count += CountProtocolSynthesizedIvars(PD); 980 } 981 return count; 982} 983 984/// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 985ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) { 986 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 987 I = ObjCImpls.find(D); 988 if (I != ObjCImpls.end()) 989 return cast<ObjCImplementationDecl>(I->second); 990 return 0; 991} 992/// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 993ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) { 994 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 995 I = ObjCImpls.find(D); 996 if (I != ObjCImpls.end()) 997 return cast<ObjCCategoryImplDecl>(I->second); 998 return 0; 999} 1000 1001/// \brief Set the implementation of ObjCInterfaceDecl. 1002void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD, 1003 ObjCImplementationDecl *ImplD) { 1004 assert(IFaceD && ImplD && "Passed null params"); 1005 ObjCImpls[IFaceD] = ImplD; 1006} 1007/// \brief Set the implementation of ObjCCategoryDecl. 1008void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD, 1009 ObjCCategoryImplDecl *ImplD) { 1010 assert(CatD && ImplD && "Passed null params"); 1011 ObjCImpls[CatD] = ImplD; 1012} 1013 1014/// \brief Allocate an uninitialized TypeSourceInfo. 1015/// 1016/// The caller should initialize the memory held by TypeSourceInfo using 1017/// the TypeLoc wrappers. 1018/// 1019/// \param T the type that will be the basis for type source info. This type 1020/// should refer to how the declarator was written in source code, not to 1021/// what type semantic analysis resolved the declarator to. 1022TypeSourceInfo *ASTContext::CreateTypeSourceInfo(QualType T, 1023 unsigned DataSize) { 1024 if (!DataSize) 1025 DataSize = TypeLoc::getFullDataSizeForType(T); 1026 else 1027 assert(DataSize == TypeLoc::getFullDataSizeForType(T) && 1028 "incorrect data size provided to CreateTypeSourceInfo!"); 1029 1030 TypeSourceInfo *TInfo = 1031 (TypeSourceInfo*)BumpAlloc.Allocate(sizeof(TypeSourceInfo) + DataSize, 8); 1032 new (TInfo) TypeSourceInfo(T); 1033 return TInfo; 1034} 1035 1036TypeSourceInfo *ASTContext::getTrivialTypeSourceInfo(QualType T, 1037 SourceLocation L) { 1038 TypeSourceInfo *DI = CreateTypeSourceInfo(T); 1039 DI->getTypeLoc().initialize(L); 1040 return DI; 1041} 1042 1043/// getInterfaceLayoutImpl - Get or compute information about the 1044/// layout of the given interface. 1045/// 1046/// \param Impl - If given, also include the layout of the interface's 1047/// implementation. This may differ by including synthesized ivars. 1048const ASTRecordLayout & 1049ASTContext::getObjCLayout(const ObjCInterfaceDecl *D, 1050 const ObjCImplementationDecl *Impl) { 1051 assert(!D->isForwardDecl() && "Invalid interface decl!"); 1052 1053 // Look up this layout, if already laid out, return what we have. 1054 ObjCContainerDecl *Key = 1055 Impl ? (ObjCContainerDecl*) Impl : (ObjCContainerDecl*) D; 1056 if (const ASTRecordLayout *Entry = ObjCLayouts[Key]) 1057 return *Entry; 1058 1059 // Add in synthesized ivar count if laying out an implementation. 1060 if (Impl) { 1061 unsigned SynthCount = CountSynthesizedIvars(D); 1062 // If there aren't any sythesized ivars then reuse the interface 1063 // entry. Note we can't cache this because we simply free all 1064 // entries later; however we shouldn't look up implementations 1065 // frequently. 1066 if (SynthCount == 0) 1067 return getObjCLayout(D, 0); 1068 } 1069 1070 const ASTRecordLayout *NewEntry = 1071 ASTRecordLayoutBuilder::ComputeLayout(*this, D, Impl); 1072 ObjCLayouts[Key] = NewEntry; 1073 1074 return *NewEntry; 1075} 1076 1077const ASTRecordLayout & 1078ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) { 1079 return getObjCLayout(D, 0); 1080} 1081 1082const ASTRecordLayout & 1083ASTContext::getASTObjCImplementationLayout(const ObjCImplementationDecl *D) { 1084 return getObjCLayout(D->getClassInterface(), D); 1085} 1086 1087/// getASTRecordLayout - Get or compute information about the layout of the 1088/// specified record (struct/union/class), which indicates its size and field 1089/// position information. 1090const ASTRecordLayout &ASTContext::getASTRecordLayout(const RecordDecl *D) { 1091 D = D->getDefinition(*this); 1092 assert(D && "Cannot get layout of forward declarations!"); 1093 1094 // Look up this layout, if already laid out, return what we have. 1095 // Note that we can't save a reference to the entry because this function 1096 // is recursive. 1097 const ASTRecordLayout *Entry = ASTRecordLayouts[D]; 1098 if (Entry) return *Entry; 1099 1100 const ASTRecordLayout *NewEntry = 1101 ASTRecordLayoutBuilder::ComputeLayout(*this, D); 1102 ASTRecordLayouts[D] = NewEntry; 1103 1104 return *NewEntry; 1105} 1106 1107const CXXMethodDecl *ASTContext::getKeyFunction(const CXXRecordDecl *RD) { 1108 RD = cast<CXXRecordDecl>(RD->getDefinition(*this)); 1109 assert(RD && "Cannot get key function for forward declarations!"); 1110 1111 const CXXMethodDecl *&Entry = KeyFunctions[RD]; 1112 if (!Entry) 1113 Entry = ASTRecordLayoutBuilder::ComputeKeyFunction(RD); 1114 else 1115 assert(Entry == ASTRecordLayoutBuilder::ComputeKeyFunction(RD) && 1116 "Key function changed!"); 1117 1118 return Entry; 1119} 1120 1121//===----------------------------------------------------------------------===// 1122// Type creation/memoization methods 1123//===----------------------------------------------------------------------===// 1124 1125QualType ASTContext::getExtQualType(const Type *TypeNode, Qualifiers Quals) { 1126 unsigned Fast = Quals.getFastQualifiers(); 1127 Quals.removeFastQualifiers(); 1128 1129 // Check if we've already instantiated this type. 1130 llvm::FoldingSetNodeID ID; 1131 ExtQuals::Profile(ID, TypeNode, Quals); 1132 void *InsertPos = 0; 1133 if (ExtQuals *EQ = ExtQualNodes.FindNodeOrInsertPos(ID, InsertPos)) { 1134 assert(EQ->getQualifiers() == Quals); 1135 QualType T = QualType(EQ, Fast); 1136 return T; 1137 } 1138 1139 ExtQuals *New = new (*this, TypeAlignment) ExtQuals(*this, TypeNode, Quals); 1140 ExtQualNodes.InsertNode(New, InsertPos); 1141 QualType T = QualType(New, Fast); 1142 return T; 1143} 1144 1145QualType ASTContext::getVolatileType(QualType T) { 1146 QualType CanT = getCanonicalType(T); 1147 if (CanT.isVolatileQualified()) return T; 1148 1149 QualifierCollector Quals; 1150 const Type *TypeNode = Quals.strip(T); 1151 Quals.addVolatile(); 1152 1153 return getExtQualType(TypeNode, Quals); 1154} 1155 1156QualType ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) { 1157 QualType CanT = getCanonicalType(T); 1158 if (CanT.getAddressSpace() == AddressSpace) 1159 return T; 1160 1161 // If we are composing extended qualifiers together, merge together 1162 // into one ExtQuals node. 1163 QualifierCollector Quals; 1164 const Type *TypeNode = Quals.strip(T); 1165 1166 // If this type already has an address space specified, it cannot get 1167 // another one. 1168 assert(!Quals.hasAddressSpace() && 1169 "Type cannot be in multiple addr spaces!"); 1170 Quals.addAddressSpace(AddressSpace); 1171 1172 return getExtQualType(TypeNode, Quals); 1173} 1174 1175QualType ASTContext::getObjCGCQualType(QualType T, 1176 Qualifiers::GC GCAttr) { 1177 QualType CanT = getCanonicalType(T); 1178 if (CanT.getObjCGCAttr() == GCAttr) 1179 return T; 1180 1181 if (T->isPointerType()) { 1182 QualType Pointee = T->getAs<PointerType>()->getPointeeType(); 1183 if (Pointee->isAnyPointerType()) { 1184 QualType ResultType = getObjCGCQualType(Pointee, GCAttr); 1185 return getPointerType(ResultType); 1186 } 1187 } 1188 1189 // If we are composing extended qualifiers together, merge together 1190 // into one ExtQuals node. 1191 QualifierCollector Quals; 1192 const Type *TypeNode = Quals.strip(T); 1193 1194 // If this type already has an ObjCGC specified, it cannot get 1195 // another one. 1196 assert(!Quals.hasObjCGCAttr() && 1197 "Type cannot have multiple ObjCGCs!"); 1198 Quals.addObjCGCAttr(GCAttr); 1199 1200 return getExtQualType(TypeNode, Quals); 1201} 1202 1203static QualType getNoReturnCallConvType(ASTContext& Context, QualType T, 1204 bool AddNoReturn, 1205 CallingConv CallConv) { 1206 QualType ResultType; 1207 if (const PointerType *Pointer = T->getAs<PointerType>()) { 1208 QualType Pointee = Pointer->getPointeeType(); 1209 ResultType = getNoReturnCallConvType(Context, Pointee, AddNoReturn, 1210 CallConv); 1211 if (ResultType == Pointee) 1212 return T; 1213 1214 ResultType = Context.getPointerType(ResultType); 1215 } else if (const BlockPointerType *BlockPointer 1216 = T->getAs<BlockPointerType>()) { 1217 QualType Pointee = BlockPointer->getPointeeType(); 1218 ResultType = getNoReturnCallConvType(Context, Pointee, AddNoReturn, 1219 CallConv); 1220 if (ResultType == Pointee) 1221 return T; 1222 1223 ResultType = Context.getBlockPointerType(ResultType); 1224 } else if (const FunctionType *F = T->getAs<FunctionType>()) { 1225 if (F->getNoReturnAttr() == AddNoReturn && F->getCallConv() == CallConv) 1226 return T; 1227 1228 if (const FunctionNoProtoType *FNPT = dyn_cast<FunctionNoProtoType>(F)) { 1229 ResultType = Context.getFunctionNoProtoType(FNPT->getResultType(), 1230 AddNoReturn, CallConv); 1231 } else { 1232 const FunctionProtoType *FPT = cast<FunctionProtoType>(F); 1233 ResultType 1234 = Context.getFunctionType(FPT->getResultType(), FPT->arg_type_begin(), 1235 FPT->getNumArgs(), FPT->isVariadic(), 1236 FPT->getTypeQuals(), 1237 FPT->hasExceptionSpec(), 1238 FPT->hasAnyExceptionSpec(), 1239 FPT->getNumExceptions(), 1240 FPT->exception_begin(), 1241 AddNoReturn, CallConv); 1242 } 1243 } else 1244 return T; 1245 1246 return Context.getQualifiedType(ResultType, T.getLocalQualifiers()); 1247} 1248 1249QualType ASTContext::getNoReturnType(QualType T, bool AddNoReturn) { 1250 return getNoReturnCallConvType(*this, T, AddNoReturn, T.getCallConv()); 1251} 1252 1253QualType ASTContext::getCallConvType(QualType T, CallingConv CallConv) { 1254 return getNoReturnCallConvType(*this, T, T.getNoReturnAttr(), CallConv); 1255} 1256 1257/// getComplexType - Return the uniqued reference to the type for a complex 1258/// number with the specified element type. 1259QualType ASTContext::getComplexType(QualType T) { 1260 // Unique pointers, to guarantee there is only one pointer of a particular 1261 // structure. 1262 llvm::FoldingSetNodeID ID; 1263 ComplexType::Profile(ID, T); 1264 1265 void *InsertPos = 0; 1266 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1267 return QualType(CT, 0); 1268 1269 // If the pointee type isn't canonical, this won't be a canonical type either, 1270 // so fill in the canonical type field. 1271 QualType Canonical; 1272 if (!T.isCanonical()) { 1273 Canonical = getComplexType(getCanonicalType(T)); 1274 1275 // Get the new insert position for the node we care about. 1276 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 1277 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1278 } 1279 ComplexType *New = new (*this, TypeAlignment) ComplexType(T, Canonical); 1280 Types.push_back(New); 1281 ComplexTypes.InsertNode(New, InsertPos); 1282 return QualType(New, 0); 1283} 1284 1285/// getPointerType - Return the uniqued reference to the type for a pointer to 1286/// the specified type. 1287QualType ASTContext::getPointerType(QualType T) { 1288 // Unique pointers, to guarantee there is only one pointer of a particular 1289 // structure. 1290 llvm::FoldingSetNodeID ID; 1291 PointerType::Profile(ID, T); 1292 1293 void *InsertPos = 0; 1294 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1295 return QualType(PT, 0); 1296 1297 // If the pointee type isn't canonical, this won't be a canonical type either, 1298 // so fill in the canonical type field. 1299 QualType Canonical; 1300 if (!T.isCanonical()) { 1301 Canonical = getPointerType(getCanonicalType(T)); 1302 1303 // Get the new insert position for the node we care about. 1304 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1305 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1306 } 1307 PointerType *New = new (*this, TypeAlignment) PointerType(T, Canonical); 1308 Types.push_back(New); 1309 PointerTypes.InsertNode(New, InsertPos); 1310 return QualType(New, 0); 1311} 1312 1313/// getBlockPointerType - Return the uniqued reference to the type for 1314/// a pointer to the specified block. 1315QualType ASTContext::getBlockPointerType(QualType T) { 1316 assert(T->isFunctionType() && "block of function types only"); 1317 // Unique pointers, to guarantee there is only one block of a particular 1318 // structure. 1319 llvm::FoldingSetNodeID ID; 1320 BlockPointerType::Profile(ID, T); 1321 1322 void *InsertPos = 0; 1323 if (BlockPointerType *PT = 1324 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1325 return QualType(PT, 0); 1326 1327 // If the block pointee type isn't canonical, this won't be a canonical 1328 // type either so fill in the canonical type field. 1329 QualType Canonical; 1330 if (!T.isCanonical()) { 1331 Canonical = getBlockPointerType(getCanonicalType(T)); 1332 1333 // Get the new insert position for the node we care about. 1334 BlockPointerType *NewIP = 1335 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1336 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1337 } 1338 BlockPointerType *New 1339 = new (*this, TypeAlignment) BlockPointerType(T, Canonical); 1340 Types.push_back(New); 1341 BlockPointerTypes.InsertNode(New, InsertPos); 1342 return QualType(New, 0); 1343} 1344 1345/// getLValueReferenceType - Return the uniqued reference to the type for an 1346/// lvalue reference to the specified type. 1347QualType ASTContext::getLValueReferenceType(QualType T, bool SpelledAsLValue) { 1348 // Unique pointers, to guarantee there is only one pointer of a particular 1349 // structure. 1350 llvm::FoldingSetNodeID ID; 1351 ReferenceType::Profile(ID, T, SpelledAsLValue); 1352 1353 void *InsertPos = 0; 1354 if (LValueReferenceType *RT = 1355 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1356 return QualType(RT, 0); 1357 1358 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1359 1360 // If the referencee type isn't canonical, this won't be a canonical type 1361 // either, so fill in the canonical type field. 1362 QualType Canonical; 1363 if (!SpelledAsLValue || InnerRef || !T.isCanonical()) { 1364 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1365 Canonical = getLValueReferenceType(getCanonicalType(PointeeType)); 1366 1367 // Get the new insert position for the node we care about. 1368 LValueReferenceType *NewIP = 1369 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1370 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1371 } 1372 1373 LValueReferenceType *New 1374 = new (*this, TypeAlignment) LValueReferenceType(T, Canonical, 1375 SpelledAsLValue); 1376 Types.push_back(New); 1377 LValueReferenceTypes.InsertNode(New, InsertPos); 1378 1379 return QualType(New, 0); 1380} 1381 1382/// getRValueReferenceType - Return the uniqued reference to the type for an 1383/// rvalue reference to the specified type. 1384QualType ASTContext::getRValueReferenceType(QualType T) { 1385 // Unique pointers, to guarantee there is only one pointer of a particular 1386 // structure. 1387 llvm::FoldingSetNodeID ID; 1388 ReferenceType::Profile(ID, T, false); 1389 1390 void *InsertPos = 0; 1391 if (RValueReferenceType *RT = 1392 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1393 return QualType(RT, 0); 1394 1395 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1396 1397 // If the referencee type isn't canonical, this won't be a canonical type 1398 // either, so fill in the canonical type field. 1399 QualType Canonical; 1400 if (InnerRef || !T.isCanonical()) { 1401 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1402 Canonical = getRValueReferenceType(getCanonicalType(PointeeType)); 1403 1404 // Get the new insert position for the node we care about. 1405 RValueReferenceType *NewIP = 1406 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1407 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1408 } 1409 1410 RValueReferenceType *New 1411 = new (*this, TypeAlignment) RValueReferenceType(T, Canonical); 1412 Types.push_back(New); 1413 RValueReferenceTypes.InsertNode(New, InsertPos); 1414 return QualType(New, 0); 1415} 1416 1417/// getMemberPointerType - Return the uniqued reference to the type for a 1418/// member pointer to the specified type, in the specified class. 1419QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) { 1420 // Unique pointers, to guarantee there is only one pointer of a particular 1421 // structure. 1422 llvm::FoldingSetNodeID ID; 1423 MemberPointerType::Profile(ID, T, Cls); 1424 1425 void *InsertPos = 0; 1426 if (MemberPointerType *PT = 1427 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1428 return QualType(PT, 0); 1429 1430 // If the pointee or class type isn't canonical, this won't be a canonical 1431 // type either, so fill in the canonical type field. 1432 QualType Canonical; 1433 if (!T.isCanonical() || !Cls->isCanonicalUnqualified()) { 1434 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1435 1436 // Get the new insert position for the node we care about. 1437 MemberPointerType *NewIP = 1438 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1439 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1440 } 1441 MemberPointerType *New 1442 = new (*this, TypeAlignment) MemberPointerType(T, Cls, Canonical); 1443 Types.push_back(New); 1444 MemberPointerTypes.InsertNode(New, InsertPos); 1445 return QualType(New, 0); 1446} 1447 1448/// getConstantArrayType - Return the unique reference to the type for an 1449/// array of the specified element type. 1450QualType ASTContext::getConstantArrayType(QualType EltTy, 1451 const llvm::APInt &ArySizeIn, 1452 ArrayType::ArraySizeModifier ASM, 1453 unsigned EltTypeQuals) { 1454 assert((EltTy->isDependentType() || 1455 EltTy->isIncompleteType() || EltTy->isConstantSizeType()) && 1456 "Constant array of VLAs is illegal!"); 1457 1458 // Convert the array size into a canonical width matching the pointer size for 1459 // the target. 1460 llvm::APInt ArySize(ArySizeIn); 1461 ArySize.zextOrTrunc(Target.getPointerWidth(EltTy.getAddressSpace())); 1462 1463 llvm::FoldingSetNodeID ID; 1464 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, EltTypeQuals); 1465 1466 void *InsertPos = 0; 1467 if (ConstantArrayType *ATP = 1468 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1469 return QualType(ATP, 0); 1470 1471 // If the element type isn't canonical, this won't be a canonical type either, 1472 // so fill in the canonical type field. 1473 QualType Canonical; 1474 if (!EltTy.isCanonical()) { 1475 Canonical = getConstantArrayType(getCanonicalType(EltTy), ArySize, 1476 ASM, EltTypeQuals); 1477 // Get the new insert position for the node we care about. 1478 ConstantArrayType *NewIP = 1479 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1480 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1481 } 1482 1483 ConstantArrayType *New = new(*this,TypeAlignment) 1484 ConstantArrayType(EltTy, Canonical, ArySize, ASM, EltTypeQuals); 1485 ConstantArrayTypes.InsertNode(New, InsertPos); 1486 Types.push_back(New); 1487 return QualType(New, 0); 1488} 1489 1490/// getVariableArrayType - Returns a non-unique reference to the type for a 1491/// variable array of the specified element type. 1492QualType ASTContext::getVariableArrayType(QualType EltTy, 1493 Expr *NumElts, 1494 ArrayType::ArraySizeModifier ASM, 1495 unsigned EltTypeQuals, 1496 SourceRange Brackets) { 1497 // Since we don't unique expressions, it isn't possible to unique VLA's 1498 // that have an expression provided for their size. 1499 1500 VariableArrayType *New = new(*this, TypeAlignment) 1501 VariableArrayType(EltTy, QualType(), NumElts, ASM, EltTypeQuals, Brackets); 1502 1503 VariableArrayTypes.push_back(New); 1504 Types.push_back(New); 1505 return QualType(New, 0); 1506} 1507 1508/// getDependentSizedArrayType - Returns a non-unique reference to 1509/// the type for a dependently-sized array of the specified element 1510/// type. 1511QualType ASTContext::getDependentSizedArrayType(QualType EltTy, 1512 Expr *NumElts, 1513 ArrayType::ArraySizeModifier ASM, 1514 unsigned EltTypeQuals, 1515 SourceRange Brackets) { 1516 assert((!NumElts || NumElts->isTypeDependent() || 1517 NumElts->isValueDependent()) && 1518 "Size must be type- or value-dependent!"); 1519 1520 void *InsertPos = 0; 1521 DependentSizedArrayType *Canon = 0; 1522 1523 if (NumElts) { 1524 // Dependently-sized array types that do not have a specified 1525 // number of elements will have their sizes deduced from an 1526 // initializer. 1527 llvm::FoldingSetNodeID ID; 1528 DependentSizedArrayType::Profile(ID, *this, getCanonicalType(EltTy), ASM, 1529 EltTypeQuals, NumElts); 1530 1531 Canon = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1532 } 1533 1534 DependentSizedArrayType *New; 1535 if (Canon) { 1536 // We already have a canonical version of this array type; use it as 1537 // the canonical type for a newly-built type. 1538 New = new (*this, TypeAlignment) 1539 DependentSizedArrayType(*this, EltTy, QualType(Canon, 0), 1540 NumElts, ASM, EltTypeQuals, Brackets); 1541 } else { 1542 QualType CanonEltTy = getCanonicalType(EltTy); 1543 if (CanonEltTy == EltTy) { 1544 New = new (*this, TypeAlignment) 1545 DependentSizedArrayType(*this, EltTy, QualType(), 1546 NumElts, ASM, EltTypeQuals, Brackets); 1547 1548 if (NumElts) 1549 DependentSizedArrayTypes.InsertNode(New, InsertPos); 1550 } else { 1551 QualType Canon = getDependentSizedArrayType(CanonEltTy, NumElts, 1552 ASM, EltTypeQuals, 1553 SourceRange()); 1554 New = new (*this, TypeAlignment) 1555 DependentSizedArrayType(*this, EltTy, Canon, 1556 NumElts, ASM, EltTypeQuals, Brackets); 1557 } 1558 } 1559 1560 Types.push_back(New); 1561 return QualType(New, 0); 1562} 1563 1564QualType ASTContext::getIncompleteArrayType(QualType EltTy, 1565 ArrayType::ArraySizeModifier ASM, 1566 unsigned EltTypeQuals) { 1567 llvm::FoldingSetNodeID ID; 1568 IncompleteArrayType::Profile(ID, EltTy, ASM, EltTypeQuals); 1569 1570 void *InsertPos = 0; 1571 if (IncompleteArrayType *ATP = 1572 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1573 return QualType(ATP, 0); 1574 1575 // If the element type isn't canonical, this won't be a canonical type 1576 // either, so fill in the canonical type field. 1577 QualType Canonical; 1578 1579 if (!EltTy.isCanonical()) { 1580 Canonical = getIncompleteArrayType(getCanonicalType(EltTy), 1581 ASM, EltTypeQuals); 1582 1583 // Get the new insert position for the node we care about. 1584 IncompleteArrayType *NewIP = 1585 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1586 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1587 } 1588 1589 IncompleteArrayType *New = new (*this, TypeAlignment) 1590 IncompleteArrayType(EltTy, Canonical, ASM, EltTypeQuals); 1591 1592 IncompleteArrayTypes.InsertNode(New, InsertPos); 1593 Types.push_back(New); 1594 return QualType(New, 0); 1595} 1596 1597/// getVectorType - Return the unique reference to a vector type of 1598/// the specified element type and size. VectorType must be a built-in type. 1599QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts) { 1600 BuiltinType *baseType; 1601 1602 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1603 assert(baseType != 0 && "getVectorType(): Expecting a built-in type"); 1604 1605 // Check if we've already instantiated a vector of this type. 1606 llvm::FoldingSetNodeID ID; 1607 VectorType::Profile(ID, vecType, NumElts, Type::Vector); 1608 void *InsertPos = 0; 1609 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1610 return QualType(VTP, 0); 1611 1612 // If the element type isn't canonical, this won't be a canonical type either, 1613 // so fill in the canonical type field. 1614 QualType Canonical; 1615 if (!vecType.isCanonical()) { 1616 Canonical = getVectorType(getCanonicalType(vecType), NumElts); 1617 1618 // Get the new insert position for the node we care about. 1619 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1620 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1621 } 1622 VectorType *New = new (*this, TypeAlignment) 1623 VectorType(vecType, NumElts, Canonical); 1624 VectorTypes.InsertNode(New, InsertPos); 1625 Types.push_back(New); 1626 return QualType(New, 0); 1627} 1628 1629/// getExtVectorType - Return the unique reference to an extended vector type of 1630/// the specified element type and size. VectorType must be a built-in type. 1631QualType ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) { 1632 BuiltinType *baseType; 1633 1634 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1635 assert(baseType != 0 && "getExtVectorType(): Expecting a built-in type"); 1636 1637 // Check if we've already instantiated a vector of this type. 1638 llvm::FoldingSetNodeID ID; 1639 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector); 1640 void *InsertPos = 0; 1641 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1642 return QualType(VTP, 0); 1643 1644 // If the element type isn't canonical, this won't be a canonical type either, 1645 // so fill in the canonical type field. 1646 QualType Canonical; 1647 if (!vecType.isCanonical()) { 1648 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 1649 1650 // Get the new insert position for the node we care about. 1651 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1652 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1653 } 1654 ExtVectorType *New = new (*this, TypeAlignment) 1655 ExtVectorType(vecType, NumElts, Canonical); 1656 VectorTypes.InsertNode(New, InsertPos); 1657 Types.push_back(New); 1658 return QualType(New, 0); 1659} 1660 1661QualType ASTContext::getDependentSizedExtVectorType(QualType vecType, 1662 Expr *SizeExpr, 1663 SourceLocation AttrLoc) { 1664 llvm::FoldingSetNodeID ID; 1665 DependentSizedExtVectorType::Profile(ID, *this, getCanonicalType(vecType), 1666 SizeExpr); 1667 1668 void *InsertPos = 0; 1669 DependentSizedExtVectorType *Canon 1670 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1671 DependentSizedExtVectorType *New; 1672 if (Canon) { 1673 // We already have a canonical version of this array type; use it as 1674 // the canonical type for a newly-built type. 1675 New = new (*this, TypeAlignment) 1676 DependentSizedExtVectorType(*this, vecType, QualType(Canon, 0), 1677 SizeExpr, AttrLoc); 1678 } else { 1679 QualType CanonVecTy = getCanonicalType(vecType); 1680 if (CanonVecTy == vecType) { 1681 New = new (*this, TypeAlignment) 1682 DependentSizedExtVectorType(*this, vecType, QualType(), SizeExpr, 1683 AttrLoc); 1684 DependentSizedExtVectorTypes.InsertNode(New, InsertPos); 1685 } else { 1686 QualType Canon = getDependentSizedExtVectorType(CanonVecTy, SizeExpr, 1687 SourceLocation()); 1688 New = new (*this, TypeAlignment) 1689 DependentSizedExtVectorType(*this, vecType, Canon, SizeExpr, AttrLoc); 1690 } 1691 } 1692 1693 Types.push_back(New); 1694 return QualType(New, 0); 1695} 1696 1697static CallingConv getCanonicalCallingConv(CallingConv CC) { 1698 if (CC == CC_C) 1699 return CC_Default; 1700 return CC; 1701} 1702 1703/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 1704/// 1705QualType ASTContext::getFunctionNoProtoType(QualType ResultTy, bool NoReturn, 1706 CallingConv CallConv) { 1707 // Unique functions, to guarantee there is only one function of a particular 1708 // structure. 1709 llvm::FoldingSetNodeID ID; 1710 FunctionNoProtoType::Profile(ID, ResultTy, NoReturn); 1711 1712 void *InsertPos = 0; 1713 if (FunctionNoProtoType *FT = 1714 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1715 return QualType(FT, 0); 1716 1717 QualType Canonical; 1718 if (!ResultTy.isCanonical() || 1719 getCanonicalCallingConv(CallConv) != CallConv) { 1720 Canonical = getFunctionNoProtoType(getCanonicalType(ResultTy), NoReturn, 1721 getCanonicalCallingConv(CallConv)); 1722 1723 // Get the new insert position for the node we care about. 1724 FunctionNoProtoType *NewIP = 1725 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1726 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1727 } 1728 1729 FunctionNoProtoType *New = new (*this, TypeAlignment) 1730 FunctionNoProtoType(ResultTy, Canonical, NoReturn); 1731 Types.push_back(New); 1732 FunctionNoProtoTypes.InsertNode(New, InsertPos); 1733 return QualType(New, 0); 1734} 1735 1736/// getFunctionType - Return a normal function type with a typed argument 1737/// list. isVariadic indicates whether the argument list includes '...'. 1738QualType ASTContext::getFunctionType(QualType ResultTy,const QualType *ArgArray, 1739 unsigned NumArgs, bool isVariadic, 1740 unsigned TypeQuals, bool hasExceptionSpec, 1741 bool hasAnyExceptionSpec, unsigned NumExs, 1742 const QualType *ExArray, bool NoReturn, 1743 CallingConv CallConv) { 1744 // Unique functions, to guarantee there is only one function of a particular 1745 // structure. 1746 llvm::FoldingSetNodeID ID; 1747 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, isVariadic, 1748 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1749 NumExs, ExArray, NoReturn); 1750 1751 void *InsertPos = 0; 1752 if (FunctionProtoType *FTP = 1753 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1754 return QualType(FTP, 0); 1755 1756 // Determine whether the type being created is already canonical or not. 1757 bool isCanonical = !hasExceptionSpec && ResultTy.isCanonical(); 1758 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 1759 if (!ArgArray[i].isCanonicalAsParam()) 1760 isCanonical = false; 1761 1762 // If this type isn't canonical, get the canonical version of it. 1763 // The exception spec is not part of the canonical type. 1764 QualType Canonical; 1765 if (!isCanonical || getCanonicalCallingConv(CallConv) != CallConv) { 1766 llvm::SmallVector<QualType, 16> CanonicalArgs; 1767 CanonicalArgs.reserve(NumArgs); 1768 for (unsigned i = 0; i != NumArgs; ++i) 1769 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i])); 1770 1771 Canonical = getFunctionType(getCanonicalType(ResultTy), 1772 CanonicalArgs.data(), NumArgs, 1773 isVariadic, TypeQuals, false, 1774 false, 0, 0, NoReturn, 1775 getCanonicalCallingConv(CallConv)); 1776 1777 // Get the new insert position for the node we care about. 1778 FunctionProtoType *NewIP = 1779 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1780 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1781 } 1782 1783 // FunctionProtoType objects are allocated with extra bytes after them 1784 // for two variable size arrays (for parameter and exception types) at the 1785 // end of them. 1786 FunctionProtoType *FTP = 1787 (FunctionProtoType*)Allocate(sizeof(FunctionProtoType) + 1788 NumArgs*sizeof(QualType) + 1789 NumExs*sizeof(QualType), TypeAlignment); 1790 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, isVariadic, 1791 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1792 ExArray, NumExs, Canonical, NoReturn, CallConv); 1793 Types.push_back(FTP); 1794 FunctionProtoTypes.InsertNode(FTP, InsertPos); 1795 return QualType(FTP, 0); 1796} 1797 1798/// getTypeDeclType - Return the unique reference to the type for the 1799/// specified type declaration. 1800QualType ASTContext::getTypeDeclType(TypeDecl *Decl, TypeDecl* PrevDecl) { 1801 assert(Decl && "Passed null for Decl param"); 1802 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1803 1804 if (TypedefDecl *Typedef = dyn_cast<TypedefDecl>(Decl)) 1805 return getTypedefType(Typedef); 1806 else if (isa<TemplateTypeParmDecl>(Decl)) { 1807 assert(false && "Template type parameter types are always available."); 1808 } else if (ObjCInterfaceDecl *ObjCInterface 1809 = dyn_cast<ObjCInterfaceDecl>(Decl)) 1810 return getObjCInterfaceType(ObjCInterface); 1811 1812 if (RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 1813 if (PrevDecl) 1814 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1815 else 1816 Decl->TypeForDecl = new (*this, TypeAlignment) RecordType(Record); 1817 } else if (EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 1818 if (PrevDecl) 1819 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1820 else 1821 Decl->TypeForDecl = new (*this, TypeAlignment) EnumType(Enum); 1822 } else if (UnresolvedUsingTypenameDecl *Using = 1823 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) { 1824 Decl->TypeForDecl = new (*this, TypeAlignment) UnresolvedUsingType(Using); 1825 } else 1826 assert(false && "TypeDecl without a type?"); 1827 1828 if (!PrevDecl) Types.push_back(Decl->TypeForDecl); 1829 return QualType(Decl->TypeForDecl, 0); 1830} 1831 1832/// getTypedefType - Return the unique reference to the type for the 1833/// specified typename decl. 1834QualType ASTContext::getTypedefType(TypedefDecl *Decl) { 1835 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1836 1837 QualType Canonical = getCanonicalType(Decl->getUnderlyingType()); 1838 Decl->TypeForDecl = new(*this, TypeAlignment) 1839 TypedefType(Type::Typedef, Decl, Canonical); 1840 Types.push_back(Decl->TypeForDecl); 1841 return QualType(Decl->TypeForDecl, 0); 1842} 1843 1844/// \brief Retrieve a substitution-result type. 1845QualType 1846ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm, 1847 QualType Replacement) { 1848 assert(Replacement.isCanonical() 1849 && "replacement types must always be canonical"); 1850 1851 llvm::FoldingSetNodeID ID; 1852 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement); 1853 void *InsertPos = 0; 1854 SubstTemplateTypeParmType *SubstParm 1855 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1856 1857 if (!SubstParm) { 1858 SubstParm = new (*this, TypeAlignment) 1859 SubstTemplateTypeParmType(Parm, Replacement); 1860 Types.push_back(SubstParm); 1861 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 1862 } 1863 1864 return QualType(SubstParm, 0); 1865} 1866 1867/// \brief Retrieve the template type parameter type for a template 1868/// parameter or parameter pack with the given depth, index, and (optionally) 1869/// name. 1870QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 1871 bool ParameterPack, 1872 IdentifierInfo *Name) { 1873 llvm::FoldingSetNodeID ID; 1874 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, Name); 1875 void *InsertPos = 0; 1876 TemplateTypeParmType *TypeParm 1877 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1878 1879 if (TypeParm) 1880 return QualType(TypeParm, 0); 1881 1882 if (Name) { 1883 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 1884 TypeParm = new (*this, TypeAlignment) 1885 TemplateTypeParmType(Depth, Index, ParameterPack, Name, Canon); 1886 } else 1887 TypeParm = new (*this, TypeAlignment) 1888 TemplateTypeParmType(Depth, Index, ParameterPack); 1889 1890 Types.push_back(TypeParm); 1891 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 1892 1893 return QualType(TypeParm, 0); 1894} 1895 1896QualType 1897ASTContext::getTemplateSpecializationType(TemplateName Template, 1898 const TemplateArgumentListInfo &Args, 1899 QualType Canon) { 1900 unsigned NumArgs = Args.size(); 1901 1902 llvm::SmallVector<TemplateArgument, 4> ArgVec; 1903 ArgVec.reserve(NumArgs); 1904 for (unsigned i = 0; i != NumArgs; ++i) 1905 ArgVec.push_back(Args[i].getArgument()); 1906 1907 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs, Canon); 1908} 1909 1910QualType 1911ASTContext::getTemplateSpecializationType(TemplateName Template, 1912 const TemplateArgument *Args, 1913 unsigned NumArgs, 1914 QualType Canon) { 1915 if (!Canon.isNull()) 1916 Canon = getCanonicalType(Canon); 1917 else { 1918 // Build the canonical template specialization type. 1919 TemplateName CanonTemplate = getCanonicalTemplateName(Template); 1920 llvm::SmallVector<TemplateArgument, 4> CanonArgs; 1921 CanonArgs.reserve(NumArgs); 1922 for (unsigned I = 0; I != NumArgs; ++I) 1923 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I])); 1924 1925 // Determine whether this canonical template specialization type already 1926 // exists. 1927 llvm::FoldingSetNodeID ID; 1928 TemplateSpecializationType::Profile(ID, CanonTemplate, 1929 CanonArgs.data(), NumArgs, *this); 1930 1931 void *InsertPos = 0; 1932 TemplateSpecializationType *Spec 1933 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 1934 1935 if (!Spec) { 1936 // Allocate a new canonical template specialization type. 1937 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1938 sizeof(TemplateArgument) * NumArgs), 1939 TypeAlignment); 1940 Spec = new (Mem) TemplateSpecializationType(*this, CanonTemplate, 1941 CanonArgs.data(), NumArgs, 1942 Canon); 1943 Types.push_back(Spec); 1944 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 1945 } 1946 1947 if (Canon.isNull()) 1948 Canon = QualType(Spec, 0); 1949 assert(Canon->isDependentType() && 1950 "Non-dependent template-id type must have a canonical type"); 1951 } 1952 1953 // Allocate the (non-canonical) template specialization type, but don't 1954 // try to unique it: these types typically have location information that 1955 // we don't unique and don't want to lose. 1956 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1957 sizeof(TemplateArgument) * NumArgs), 1958 TypeAlignment); 1959 TemplateSpecializationType *Spec 1960 = new (Mem) TemplateSpecializationType(*this, Template, Args, NumArgs, 1961 Canon); 1962 1963 Types.push_back(Spec); 1964 return QualType(Spec, 0); 1965} 1966 1967QualType 1968ASTContext::getQualifiedNameType(NestedNameSpecifier *NNS, 1969 QualType NamedType) { 1970 llvm::FoldingSetNodeID ID; 1971 QualifiedNameType::Profile(ID, NNS, NamedType); 1972 1973 void *InsertPos = 0; 1974 QualifiedNameType *T 1975 = QualifiedNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1976 if (T) 1977 return QualType(T, 0); 1978 1979 T = new (*this) QualifiedNameType(NNS, NamedType, 1980 getCanonicalType(NamedType)); 1981 Types.push_back(T); 1982 QualifiedNameTypes.InsertNode(T, InsertPos); 1983 return QualType(T, 0); 1984} 1985 1986QualType ASTContext::getTypenameType(NestedNameSpecifier *NNS, 1987 const IdentifierInfo *Name, 1988 QualType Canon) { 1989 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 1990 1991 if (Canon.isNull()) { 1992 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 1993 if (CanonNNS != NNS) 1994 Canon = getTypenameType(CanonNNS, Name); 1995 } 1996 1997 llvm::FoldingSetNodeID ID; 1998 TypenameType::Profile(ID, NNS, Name); 1999 2000 void *InsertPos = 0; 2001 TypenameType *T 2002 = TypenameTypes.FindNodeOrInsertPos(ID, InsertPos); 2003 if (T) 2004 return QualType(T, 0); 2005 2006 T = new (*this) TypenameType(NNS, Name, Canon); 2007 Types.push_back(T); 2008 TypenameTypes.InsertNode(T, InsertPos); 2009 return QualType(T, 0); 2010} 2011 2012QualType 2013ASTContext::getTypenameType(NestedNameSpecifier *NNS, 2014 const TemplateSpecializationType *TemplateId, 2015 QualType Canon) { 2016 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 2017 2018 if (Canon.isNull()) { 2019 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2020 QualType CanonType = getCanonicalType(QualType(TemplateId, 0)); 2021 if (CanonNNS != NNS || CanonType != QualType(TemplateId, 0)) { 2022 const TemplateSpecializationType *CanonTemplateId 2023 = CanonType->getAs<TemplateSpecializationType>(); 2024 assert(CanonTemplateId && 2025 "Canonical type must also be a template specialization type"); 2026 Canon = getTypenameType(CanonNNS, CanonTemplateId); 2027 } 2028 } 2029 2030 llvm::FoldingSetNodeID ID; 2031 TypenameType::Profile(ID, NNS, TemplateId); 2032 2033 void *InsertPos = 0; 2034 TypenameType *T 2035 = TypenameTypes.FindNodeOrInsertPos(ID, InsertPos); 2036 if (T) 2037 return QualType(T, 0); 2038 2039 T = new (*this) TypenameType(NNS, TemplateId, Canon); 2040 Types.push_back(T); 2041 TypenameTypes.InsertNode(T, InsertPos); 2042 return QualType(T, 0); 2043} 2044 2045QualType 2046ASTContext::getElaboratedType(QualType UnderlyingType, 2047 ElaboratedType::TagKind Tag) { 2048 llvm::FoldingSetNodeID ID; 2049 ElaboratedType::Profile(ID, UnderlyingType, Tag); 2050 2051 void *InsertPos = 0; 2052 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2053 if (T) 2054 return QualType(T, 0); 2055 2056 QualType Canon = getCanonicalType(UnderlyingType); 2057 2058 T = new (*this) ElaboratedType(UnderlyingType, Tag, Canon); 2059 Types.push_back(T); 2060 ElaboratedTypes.InsertNode(T, InsertPos); 2061 return QualType(T, 0); 2062} 2063 2064/// CmpProtocolNames - Comparison predicate for sorting protocols 2065/// alphabetically. 2066static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 2067 const ObjCProtocolDecl *RHS) { 2068 return LHS->getDeclName() < RHS->getDeclName(); 2069} 2070 2071static bool areSortedAndUniqued(ObjCProtocolDecl **Protocols, 2072 unsigned NumProtocols) { 2073 if (NumProtocols == 0) return true; 2074 2075 for (unsigned i = 1; i != NumProtocols; ++i) 2076 if (!CmpProtocolNames(Protocols[i-1], Protocols[i])) 2077 return false; 2078 return true; 2079} 2080 2081static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols, 2082 unsigned &NumProtocols) { 2083 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 2084 2085 // Sort protocols, keyed by name. 2086 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 2087 2088 // Remove duplicates. 2089 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 2090 NumProtocols = ProtocolsEnd-Protocols; 2091} 2092 2093/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 2094/// the given interface decl and the conforming protocol list. 2095QualType ASTContext::getObjCObjectPointerType(QualType InterfaceT, 2096 ObjCProtocolDecl **Protocols, 2097 unsigned NumProtocols) { 2098 llvm::FoldingSetNodeID ID; 2099 ObjCObjectPointerType::Profile(ID, InterfaceT, Protocols, NumProtocols); 2100 2101 void *InsertPos = 0; 2102 if (ObjCObjectPointerType *QT = 2103 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2104 return QualType(QT, 0); 2105 2106 // Sort the protocol list alphabetically to canonicalize it. 2107 QualType Canonical; 2108 if (!InterfaceT.isCanonical() || 2109 !areSortedAndUniqued(Protocols, NumProtocols)) { 2110 if (!areSortedAndUniqued(Protocols, NumProtocols)) { 2111 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(NumProtocols); 2112 unsigned UniqueCount = NumProtocols; 2113 2114 std::copy(Protocols, Protocols + NumProtocols, Sorted.begin()); 2115 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2116 2117 Canonical = getObjCObjectPointerType(getCanonicalType(InterfaceT), 2118 &Sorted[0], UniqueCount); 2119 } else { 2120 Canonical = getObjCObjectPointerType(getCanonicalType(InterfaceT), 2121 Protocols, NumProtocols); 2122 } 2123 2124 // Regenerate InsertPos. 2125 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2126 } 2127 2128 // No Match; 2129 ObjCObjectPointerType *QType = new (*this, TypeAlignment) 2130 ObjCObjectPointerType(*this, Canonical, InterfaceT, Protocols, 2131 NumProtocols); 2132 2133 Types.push_back(QType); 2134 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 2135 return QualType(QType, 0); 2136} 2137 2138/// getObjCInterfaceType - Return the unique reference to the type for the 2139/// specified ObjC interface decl. The list of protocols is optional. 2140QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl, 2141 ObjCProtocolDecl **Protocols, unsigned NumProtocols) { 2142 llvm::FoldingSetNodeID ID; 2143 ObjCInterfaceType::Profile(ID, Decl, Protocols, NumProtocols); 2144 2145 void *InsertPos = 0; 2146 if (ObjCInterfaceType *QT = 2147 ObjCInterfaceTypes.FindNodeOrInsertPos(ID, InsertPos)) 2148 return QualType(QT, 0); 2149 2150 // Sort the protocol list alphabetically to canonicalize it. 2151 QualType Canonical; 2152 if (NumProtocols && !areSortedAndUniqued(Protocols, NumProtocols)) { 2153 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(NumProtocols); 2154 std::copy(Protocols, Protocols + NumProtocols, Sorted.begin()); 2155 2156 unsigned UniqueCount = NumProtocols; 2157 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2158 2159 Canonical = getObjCInterfaceType(Decl, &Sorted[0], UniqueCount); 2160 2161 ObjCInterfaceTypes.FindNodeOrInsertPos(ID, InsertPos); 2162 } 2163 2164 ObjCInterfaceType *QType = new (*this, TypeAlignment) 2165 ObjCInterfaceType(*this, Canonical, const_cast<ObjCInterfaceDecl*>(Decl), 2166 Protocols, NumProtocols); 2167 2168 Types.push_back(QType); 2169 ObjCInterfaceTypes.InsertNode(QType, InsertPos); 2170 return QualType(QType, 0); 2171} 2172 2173/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 2174/// TypeOfExprType AST's (since expression's are never shared). For example, 2175/// multiple declarations that refer to "typeof(x)" all contain different 2176/// DeclRefExpr's. This doesn't effect the type checker, since it operates 2177/// on canonical type's (which are always unique). 2178QualType ASTContext::getTypeOfExprType(Expr *tofExpr) { 2179 TypeOfExprType *toe; 2180 if (tofExpr->isTypeDependent()) { 2181 llvm::FoldingSetNodeID ID; 2182 DependentTypeOfExprType::Profile(ID, *this, tofExpr); 2183 2184 void *InsertPos = 0; 2185 DependentTypeOfExprType *Canon 2186 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos); 2187 if (Canon) { 2188 // We already have a "canonical" version of an identical, dependent 2189 // typeof(expr) type. Use that as our canonical type. 2190 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, 2191 QualType((TypeOfExprType*)Canon, 0)); 2192 } 2193 else { 2194 // Build a new, canonical typeof(expr) type. 2195 Canon 2196 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr); 2197 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos); 2198 toe = Canon; 2199 } 2200 } else { 2201 QualType Canonical = getCanonicalType(tofExpr->getType()); 2202 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical); 2203 } 2204 Types.push_back(toe); 2205 return QualType(toe, 0); 2206} 2207 2208/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 2209/// TypeOfType AST's. The only motivation to unique these nodes would be 2210/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 2211/// an issue. This doesn't effect the type checker, since it operates 2212/// on canonical type's (which are always unique). 2213QualType ASTContext::getTypeOfType(QualType tofType) { 2214 QualType Canonical = getCanonicalType(tofType); 2215 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical); 2216 Types.push_back(tot); 2217 return QualType(tot, 0); 2218} 2219 2220/// getDecltypeForExpr - Given an expr, will return the decltype for that 2221/// expression, according to the rules in C++0x [dcl.type.simple]p4 2222static QualType getDecltypeForExpr(const Expr *e, ASTContext &Context) { 2223 if (e->isTypeDependent()) 2224 return Context.DependentTy; 2225 2226 // If e is an id expression or a class member access, decltype(e) is defined 2227 // as the type of the entity named by e. 2228 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 2229 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 2230 return VD->getType(); 2231 } 2232 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 2233 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 2234 return FD->getType(); 2235 } 2236 // If e is a function call or an invocation of an overloaded operator, 2237 // (parentheses around e are ignored), decltype(e) is defined as the 2238 // return type of that function. 2239 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 2240 return CE->getCallReturnType(); 2241 2242 QualType T = e->getType(); 2243 2244 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 2245 // defined as T&, otherwise decltype(e) is defined as T. 2246 if (e->isLvalue(Context) == Expr::LV_Valid) 2247 T = Context.getLValueReferenceType(T); 2248 2249 return T; 2250} 2251 2252/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 2253/// DecltypeType AST's. The only motivation to unique these nodes would be 2254/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 2255/// an issue. This doesn't effect the type checker, since it operates 2256/// on canonical type's (which are always unique). 2257QualType ASTContext::getDecltypeType(Expr *e) { 2258 DecltypeType *dt; 2259 if (e->isTypeDependent()) { 2260 llvm::FoldingSetNodeID ID; 2261 DependentDecltypeType::Profile(ID, *this, e); 2262 2263 void *InsertPos = 0; 2264 DependentDecltypeType *Canon 2265 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos); 2266 if (Canon) { 2267 // We already have a "canonical" version of an equivalent, dependent 2268 // decltype type. Use that as our canonical type. 2269 dt = new (*this, TypeAlignment) DecltypeType(e, DependentTy, 2270 QualType((DecltypeType*)Canon, 0)); 2271 } 2272 else { 2273 // Build a new, canonical typeof(expr) type. 2274 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e); 2275 DependentDecltypeTypes.InsertNode(Canon, InsertPos); 2276 dt = Canon; 2277 } 2278 } else { 2279 QualType T = getDecltypeForExpr(e, *this); 2280 dt = new (*this, TypeAlignment) DecltypeType(e, T, getCanonicalType(T)); 2281 } 2282 Types.push_back(dt); 2283 return QualType(dt, 0); 2284} 2285 2286/// getTagDeclType - Return the unique reference to the type for the 2287/// specified TagDecl (struct/union/class/enum) decl. 2288QualType ASTContext::getTagDeclType(const TagDecl *Decl) { 2289 assert (Decl); 2290 // FIXME: What is the design on getTagDeclType when it requires casting 2291 // away const? mutable? 2292 return getTypeDeclType(const_cast<TagDecl*>(Decl)); 2293} 2294 2295/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 2296/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 2297/// needs to agree with the definition in <stddef.h>. 2298CanQualType ASTContext::getSizeType() const { 2299 return getFromTargetType(Target.getSizeType()); 2300} 2301 2302/// getSignedWCharType - Return the type of "signed wchar_t". 2303/// Used when in C++, as a GCC extension. 2304QualType ASTContext::getSignedWCharType() const { 2305 // FIXME: derive from "Target" ? 2306 return WCharTy; 2307} 2308 2309/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 2310/// Used when in C++, as a GCC extension. 2311QualType ASTContext::getUnsignedWCharType() const { 2312 // FIXME: derive from "Target" ? 2313 return UnsignedIntTy; 2314} 2315 2316/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 2317/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 2318QualType ASTContext::getPointerDiffType() const { 2319 return getFromTargetType(Target.getPtrDiffType(0)); 2320} 2321 2322//===----------------------------------------------------------------------===// 2323// Type Operators 2324//===----------------------------------------------------------------------===// 2325 2326CanQualType ASTContext::getCanonicalParamType(QualType T) { 2327 // Push qualifiers into arrays, and then discard any remaining 2328 // qualifiers. 2329 T = getCanonicalType(T); 2330 const Type *Ty = T.getTypePtr(); 2331 2332 QualType Result; 2333 if (isa<ArrayType>(Ty)) { 2334 Result = getArrayDecayedType(QualType(Ty,0)); 2335 } else if (isa<FunctionType>(Ty)) { 2336 Result = getPointerType(QualType(Ty, 0)); 2337 } else { 2338 Result = QualType(Ty, 0); 2339 } 2340 2341 return CanQualType::CreateUnsafe(Result); 2342} 2343 2344/// getCanonicalType - Return the canonical (structural) type corresponding to 2345/// the specified potentially non-canonical type. The non-canonical version 2346/// of a type may have many "decorated" versions of types. Decorators can 2347/// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 2348/// to be free of any of these, allowing two canonical types to be compared 2349/// for exact equality with a simple pointer comparison. 2350CanQualType ASTContext::getCanonicalType(QualType T) { 2351 QualifierCollector Quals; 2352 const Type *Ptr = Quals.strip(T); 2353 QualType CanType = Ptr->getCanonicalTypeInternal(); 2354 2355 // The canonical internal type will be the canonical type *except* 2356 // that we push type qualifiers down through array types. 2357 2358 // If there are no new qualifiers to push down, stop here. 2359 if (!Quals.hasQualifiers()) 2360 return CanQualType::CreateUnsafe(CanType); 2361 2362 // If the type qualifiers are on an array type, get the canonical 2363 // type of the array with the qualifiers applied to the element 2364 // type. 2365 ArrayType *AT = dyn_cast<ArrayType>(CanType); 2366 if (!AT) 2367 return CanQualType::CreateUnsafe(getQualifiedType(CanType, Quals)); 2368 2369 // Get the canonical version of the element with the extra qualifiers on it. 2370 // This can recursively sink qualifiers through multiple levels of arrays. 2371 QualType NewEltTy = getQualifiedType(AT->getElementType(), Quals); 2372 NewEltTy = getCanonicalType(NewEltTy); 2373 2374 if (ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 2375 return CanQualType::CreateUnsafe( 2376 getConstantArrayType(NewEltTy, CAT->getSize(), 2377 CAT->getSizeModifier(), 2378 CAT->getIndexTypeCVRQualifiers())); 2379 if (IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) 2380 return CanQualType::CreateUnsafe( 2381 getIncompleteArrayType(NewEltTy, IAT->getSizeModifier(), 2382 IAT->getIndexTypeCVRQualifiers())); 2383 2384 if (DependentSizedArrayType *DSAT = dyn_cast<DependentSizedArrayType>(AT)) 2385 return CanQualType::CreateUnsafe( 2386 getDependentSizedArrayType(NewEltTy, 2387 DSAT->getSizeExpr() ? 2388 DSAT->getSizeExpr()->Retain() : 0, 2389 DSAT->getSizeModifier(), 2390 DSAT->getIndexTypeCVRQualifiers(), 2391 DSAT->getBracketsRange())->getCanonicalTypeInternal()); 2392 2393 VariableArrayType *VAT = cast<VariableArrayType>(AT); 2394 return CanQualType::CreateUnsafe(getVariableArrayType(NewEltTy, 2395 VAT->getSizeExpr() ? 2396 VAT->getSizeExpr()->Retain() : 0, 2397 VAT->getSizeModifier(), 2398 VAT->getIndexTypeCVRQualifiers(), 2399 VAT->getBracketsRange())); 2400} 2401 2402QualType ASTContext::getUnqualifiedArrayType(QualType T, 2403 Qualifiers &Quals) { 2404 Quals = T.getQualifiers(); 2405 if (!isa<ArrayType>(T)) { 2406 return T.getUnqualifiedType(); 2407 } 2408 2409 const ArrayType *AT = cast<ArrayType>(T); 2410 QualType Elt = AT->getElementType(); 2411 QualType UnqualElt = getUnqualifiedArrayType(Elt, Quals); 2412 if (Elt == UnqualElt) 2413 return T; 2414 2415 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(T)) { 2416 return getConstantArrayType(UnqualElt, CAT->getSize(), 2417 CAT->getSizeModifier(), 0); 2418 } 2419 2420 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(T)) { 2421 return getIncompleteArrayType(UnqualElt, IAT->getSizeModifier(), 0); 2422 } 2423 2424 const DependentSizedArrayType *DSAT = cast<DependentSizedArrayType>(T); 2425 return getDependentSizedArrayType(UnqualElt, DSAT->getSizeExpr()->Retain(), 2426 DSAT->getSizeModifier(), 0, 2427 SourceRange()); 2428} 2429 2430DeclarationName ASTContext::getNameForTemplate(TemplateName Name) { 2431 if (TemplateDecl *TD = Name.getAsTemplateDecl()) 2432 return TD->getDeclName(); 2433 2434 if (DependentTemplateName *DTN = Name.getAsDependentTemplateName()) { 2435 if (DTN->isIdentifier()) { 2436 return DeclarationNames.getIdentifier(DTN->getIdentifier()); 2437 } else { 2438 return DeclarationNames.getCXXOperatorName(DTN->getOperator()); 2439 } 2440 } 2441 2442 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate(); 2443 assert(Storage); 2444 return (*Storage->begin())->getDeclName(); 2445} 2446 2447TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) { 2448 // If this template name refers to a template, the canonical 2449 // template name merely stores the template itself. 2450 if (TemplateDecl *Template = Name.getAsTemplateDecl()) 2451 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 2452 2453 assert(!Name.getAsOverloadedTemplate()); 2454 2455 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 2456 assert(DTN && "Non-dependent template names must refer to template decls."); 2457 return DTN->CanonicalTemplateName; 2458} 2459 2460bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) { 2461 X = getCanonicalTemplateName(X); 2462 Y = getCanonicalTemplateName(Y); 2463 return X.getAsVoidPointer() == Y.getAsVoidPointer(); 2464} 2465 2466TemplateArgument 2467ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) { 2468 switch (Arg.getKind()) { 2469 case TemplateArgument::Null: 2470 return Arg; 2471 2472 case TemplateArgument::Expression: 2473 return Arg; 2474 2475 case TemplateArgument::Declaration: 2476 return TemplateArgument(Arg.getAsDecl()->getCanonicalDecl()); 2477 2478 case TemplateArgument::Template: 2479 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate())); 2480 2481 case TemplateArgument::Integral: 2482 return TemplateArgument(*Arg.getAsIntegral(), 2483 getCanonicalType(Arg.getIntegralType())); 2484 2485 case TemplateArgument::Type: 2486 return TemplateArgument(getCanonicalType(Arg.getAsType())); 2487 2488 case TemplateArgument::Pack: { 2489 // FIXME: Allocate in ASTContext 2490 TemplateArgument *CanonArgs = new TemplateArgument[Arg.pack_size()]; 2491 unsigned Idx = 0; 2492 for (TemplateArgument::pack_iterator A = Arg.pack_begin(), 2493 AEnd = Arg.pack_end(); 2494 A != AEnd; (void)++A, ++Idx) 2495 CanonArgs[Idx] = getCanonicalTemplateArgument(*A); 2496 2497 TemplateArgument Result; 2498 Result.setArgumentPack(CanonArgs, Arg.pack_size(), false); 2499 return Result; 2500 } 2501 } 2502 2503 // Silence GCC warning 2504 assert(false && "Unhandled template argument kind"); 2505 return TemplateArgument(); 2506} 2507 2508NestedNameSpecifier * 2509ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) { 2510 if (!NNS) 2511 return 0; 2512 2513 switch (NNS->getKind()) { 2514 case NestedNameSpecifier::Identifier: 2515 // Canonicalize the prefix but keep the identifier the same. 2516 return NestedNameSpecifier::Create(*this, 2517 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 2518 NNS->getAsIdentifier()); 2519 2520 case NestedNameSpecifier::Namespace: 2521 // A namespace is canonical; build a nested-name-specifier with 2522 // this namespace and no prefix. 2523 return NestedNameSpecifier::Create(*this, 0, NNS->getAsNamespace()); 2524 2525 case NestedNameSpecifier::TypeSpec: 2526 case NestedNameSpecifier::TypeSpecWithTemplate: { 2527 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 2528 return NestedNameSpecifier::Create(*this, 0, 2529 NNS->getKind() == NestedNameSpecifier::TypeSpecWithTemplate, 2530 T.getTypePtr()); 2531 } 2532 2533 case NestedNameSpecifier::Global: 2534 // The global specifier is canonical and unique. 2535 return NNS; 2536 } 2537 2538 // Required to silence a GCC warning 2539 return 0; 2540} 2541 2542 2543const ArrayType *ASTContext::getAsArrayType(QualType T) { 2544 // Handle the non-qualified case efficiently. 2545 if (!T.hasLocalQualifiers()) { 2546 // Handle the common positive case fast. 2547 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 2548 return AT; 2549 } 2550 2551 // Handle the common negative case fast. 2552 QualType CType = T->getCanonicalTypeInternal(); 2553 if (!isa<ArrayType>(CType)) 2554 return 0; 2555 2556 // Apply any qualifiers from the array type to the element type. This 2557 // implements C99 6.7.3p8: "If the specification of an array type includes 2558 // any type qualifiers, the element type is so qualified, not the array type." 2559 2560 // If we get here, we either have type qualifiers on the type, or we have 2561 // sugar such as a typedef in the way. If we have type qualifiers on the type 2562 // we must propagate them down into the element type. 2563 2564 QualifierCollector Qs; 2565 const Type *Ty = Qs.strip(T.getDesugaredType()); 2566 2567 // If we have a simple case, just return now. 2568 const ArrayType *ATy = dyn_cast<ArrayType>(Ty); 2569 if (ATy == 0 || Qs.empty()) 2570 return ATy; 2571 2572 // Otherwise, we have an array and we have qualifiers on it. Push the 2573 // qualifiers into the array element type and return a new array type. 2574 // Get the canonical version of the element with the extra qualifiers on it. 2575 // This can recursively sink qualifiers through multiple levels of arrays. 2576 QualType NewEltTy = getQualifiedType(ATy->getElementType(), Qs); 2577 2578 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 2579 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 2580 CAT->getSizeModifier(), 2581 CAT->getIndexTypeCVRQualifiers())); 2582 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 2583 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 2584 IAT->getSizeModifier(), 2585 IAT->getIndexTypeCVRQualifiers())); 2586 2587 if (const DependentSizedArrayType *DSAT 2588 = dyn_cast<DependentSizedArrayType>(ATy)) 2589 return cast<ArrayType>( 2590 getDependentSizedArrayType(NewEltTy, 2591 DSAT->getSizeExpr() ? 2592 DSAT->getSizeExpr()->Retain() : 0, 2593 DSAT->getSizeModifier(), 2594 DSAT->getIndexTypeCVRQualifiers(), 2595 DSAT->getBracketsRange())); 2596 2597 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 2598 return cast<ArrayType>(getVariableArrayType(NewEltTy, 2599 VAT->getSizeExpr() ? 2600 VAT->getSizeExpr()->Retain() : 0, 2601 VAT->getSizeModifier(), 2602 VAT->getIndexTypeCVRQualifiers(), 2603 VAT->getBracketsRange())); 2604} 2605 2606 2607/// getArrayDecayedType - Return the properly qualified result of decaying the 2608/// specified array type to a pointer. This operation is non-trivial when 2609/// handling typedefs etc. The canonical type of "T" must be an array type, 2610/// this returns a pointer to a properly qualified element of the array. 2611/// 2612/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 2613QualType ASTContext::getArrayDecayedType(QualType Ty) { 2614 // Get the element type with 'getAsArrayType' so that we don't lose any 2615 // typedefs in the element type of the array. This also handles propagation 2616 // of type qualifiers from the array type into the element type if present 2617 // (C99 6.7.3p8). 2618 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 2619 assert(PrettyArrayType && "Not an array type!"); 2620 2621 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 2622 2623 // int x[restrict 4] -> int *restrict 2624 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers()); 2625} 2626 2627QualType ASTContext::getBaseElementType(QualType QT) { 2628 QualifierCollector Qs; 2629 while (true) { 2630 const Type *UT = Qs.strip(QT); 2631 if (const ArrayType *AT = getAsArrayType(QualType(UT,0))) { 2632 QT = AT->getElementType(); 2633 } else { 2634 return Qs.apply(QT); 2635 } 2636 } 2637} 2638 2639QualType ASTContext::getBaseElementType(const ArrayType *AT) { 2640 QualType ElemTy = AT->getElementType(); 2641 2642 if (const ArrayType *AT = getAsArrayType(ElemTy)) 2643 return getBaseElementType(AT); 2644 2645 return ElemTy; 2646} 2647 2648/// getConstantArrayElementCount - Returns number of constant array elements. 2649uint64_t 2650ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const { 2651 uint64_t ElementCount = 1; 2652 do { 2653 ElementCount *= CA->getSize().getZExtValue(); 2654 CA = dyn_cast<ConstantArrayType>(CA->getElementType()); 2655 } while (CA); 2656 return ElementCount; 2657} 2658 2659/// getFloatingRank - Return a relative rank for floating point types. 2660/// This routine will assert if passed a built-in type that isn't a float. 2661static FloatingRank getFloatingRank(QualType T) { 2662 if (const ComplexType *CT = T->getAs<ComplexType>()) 2663 return getFloatingRank(CT->getElementType()); 2664 2665 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type"); 2666 switch (T->getAs<BuiltinType>()->getKind()) { 2667 default: assert(0 && "getFloatingRank(): not a floating type"); 2668 case BuiltinType::Float: return FloatRank; 2669 case BuiltinType::Double: return DoubleRank; 2670 case BuiltinType::LongDouble: return LongDoubleRank; 2671 } 2672} 2673 2674/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 2675/// point or a complex type (based on typeDomain/typeSize). 2676/// 'typeDomain' is a real floating point or complex type. 2677/// 'typeSize' is a real floating point or complex type. 2678QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 2679 QualType Domain) const { 2680 FloatingRank EltRank = getFloatingRank(Size); 2681 if (Domain->isComplexType()) { 2682 switch (EltRank) { 2683 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2684 case FloatRank: return FloatComplexTy; 2685 case DoubleRank: return DoubleComplexTy; 2686 case LongDoubleRank: return LongDoubleComplexTy; 2687 } 2688 } 2689 2690 assert(Domain->isRealFloatingType() && "Unknown domain!"); 2691 switch (EltRank) { 2692 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2693 case FloatRank: return FloatTy; 2694 case DoubleRank: return DoubleTy; 2695 case LongDoubleRank: return LongDoubleTy; 2696 } 2697} 2698 2699/// getFloatingTypeOrder - Compare the rank of the two specified floating 2700/// point types, ignoring the domain of the type (i.e. 'double' == 2701/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 2702/// LHS < RHS, return -1. 2703int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) { 2704 FloatingRank LHSR = getFloatingRank(LHS); 2705 FloatingRank RHSR = getFloatingRank(RHS); 2706 2707 if (LHSR == RHSR) 2708 return 0; 2709 if (LHSR > RHSR) 2710 return 1; 2711 return -1; 2712} 2713 2714/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 2715/// routine will assert if passed a built-in type that isn't an integer or enum, 2716/// or if it is not canonicalized. 2717unsigned ASTContext::getIntegerRank(Type *T) { 2718 assert(T->isCanonicalUnqualified() && "T should be canonicalized"); 2719 if (EnumType* ET = dyn_cast<EnumType>(T)) 2720 T = ET->getDecl()->getPromotionType().getTypePtr(); 2721 2722 if (T->isSpecificBuiltinType(BuiltinType::WChar)) 2723 T = getFromTargetType(Target.getWCharType()).getTypePtr(); 2724 2725 if (T->isSpecificBuiltinType(BuiltinType::Char16)) 2726 T = getFromTargetType(Target.getChar16Type()).getTypePtr(); 2727 2728 if (T->isSpecificBuiltinType(BuiltinType::Char32)) 2729 T = getFromTargetType(Target.getChar32Type()).getTypePtr(); 2730 2731 switch (cast<BuiltinType>(T)->getKind()) { 2732 default: assert(0 && "getIntegerRank(): not a built-in integer"); 2733 case BuiltinType::Bool: 2734 return 1 + (getIntWidth(BoolTy) << 3); 2735 case BuiltinType::Char_S: 2736 case BuiltinType::Char_U: 2737 case BuiltinType::SChar: 2738 case BuiltinType::UChar: 2739 return 2 + (getIntWidth(CharTy) << 3); 2740 case BuiltinType::Short: 2741 case BuiltinType::UShort: 2742 return 3 + (getIntWidth(ShortTy) << 3); 2743 case BuiltinType::Int: 2744 case BuiltinType::UInt: 2745 return 4 + (getIntWidth(IntTy) << 3); 2746 case BuiltinType::Long: 2747 case BuiltinType::ULong: 2748 return 5 + (getIntWidth(LongTy) << 3); 2749 case BuiltinType::LongLong: 2750 case BuiltinType::ULongLong: 2751 return 6 + (getIntWidth(LongLongTy) << 3); 2752 case BuiltinType::Int128: 2753 case BuiltinType::UInt128: 2754 return 7 + (getIntWidth(Int128Ty) << 3); 2755 } 2756} 2757 2758/// \brief Whether this is a promotable bitfield reference according 2759/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 2760/// 2761/// \returns the type this bit-field will promote to, or NULL if no 2762/// promotion occurs. 2763QualType ASTContext::isPromotableBitField(Expr *E) { 2764 FieldDecl *Field = E->getBitField(); 2765 if (!Field) 2766 return QualType(); 2767 2768 QualType FT = Field->getType(); 2769 2770 llvm::APSInt BitWidthAP = Field->getBitWidth()->EvaluateAsInt(*this); 2771 uint64_t BitWidth = BitWidthAP.getZExtValue(); 2772 uint64_t IntSize = getTypeSize(IntTy); 2773 // GCC extension compatibility: if the bit-field size is less than or equal 2774 // to the size of int, it gets promoted no matter what its type is. 2775 // For instance, unsigned long bf : 4 gets promoted to signed int. 2776 if (BitWidth < IntSize) 2777 return IntTy; 2778 2779 if (BitWidth == IntSize) 2780 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy; 2781 2782 // Types bigger than int are not subject to promotions, and therefore act 2783 // like the base type. 2784 // FIXME: This doesn't quite match what gcc does, but what gcc does here 2785 // is ridiculous. 2786 return QualType(); 2787} 2788 2789/// getPromotedIntegerType - Returns the type that Promotable will 2790/// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 2791/// integer type. 2792QualType ASTContext::getPromotedIntegerType(QualType Promotable) { 2793 assert(!Promotable.isNull()); 2794 assert(Promotable->isPromotableIntegerType()); 2795 if (const EnumType *ET = Promotable->getAs<EnumType>()) 2796 return ET->getDecl()->getPromotionType(); 2797 if (Promotable->isSignedIntegerType()) 2798 return IntTy; 2799 uint64_t PromotableSize = getTypeSize(Promotable); 2800 uint64_t IntSize = getTypeSize(IntTy); 2801 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize); 2802 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy; 2803} 2804 2805/// getIntegerTypeOrder - Returns the highest ranked integer type: 2806/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 2807/// LHS < RHS, return -1. 2808int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) { 2809 Type *LHSC = getCanonicalType(LHS).getTypePtr(); 2810 Type *RHSC = getCanonicalType(RHS).getTypePtr(); 2811 if (LHSC == RHSC) return 0; 2812 2813 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 2814 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 2815 2816 unsigned LHSRank = getIntegerRank(LHSC); 2817 unsigned RHSRank = getIntegerRank(RHSC); 2818 2819 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 2820 if (LHSRank == RHSRank) return 0; 2821 return LHSRank > RHSRank ? 1 : -1; 2822 } 2823 2824 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 2825 if (LHSUnsigned) { 2826 // If the unsigned [LHS] type is larger, return it. 2827 if (LHSRank >= RHSRank) 2828 return 1; 2829 2830 // If the signed type can represent all values of the unsigned type, it 2831 // wins. Because we are dealing with 2's complement and types that are 2832 // powers of two larger than each other, this is always safe. 2833 return -1; 2834 } 2835 2836 // If the unsigned [RHS] type is larger, return it. 2837 if (RHSRank >= LHSRank) 2838 return -1; 2839 2840 // If the signed type can represent all values of the unsigned type, it 2841 // wins. Because we are dealing with 2's complement and types that are 2842 // powers of two larger than each other, this is always safe. 2843 return 1; 2844} 2845 2846static RecordDecl * 2847CreateRecordDecl(ASTContext &Ctx, RecordDecl::TagKind TK, DeclContext *DC, 2848 SourceLocation L, IdentifierInfo *Id) { 2849 if (Ctx.getLangOptions().CPlusPlus) 2850 return CXXRecordDecl::Create(Ctx, TK, DC, L, Id); 2851 else 2852 return RecordDecl::Create(Ctx, TK, DC, L, Id); 2853} 2854 2855// getCFConstantStringType - Return the type used for constant CFStrings. 2856QualType ASTContext::getCFConstantStringType() { 2857 if (!CFConstantStringTypeDecl) { 2858 CFConstantStringTypeDecl = 2859 CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2860 &Idents.get("NSConstantString")); 2861 2862 QualType FieldTypes[4]; 2863 2864 // const int *isa; 2865 FieldTypes[0] = getPointerType(IntTy.withConst()); 2866 // int flags; 2867 FieldTypes[1] = IntTy; 2868 // const char *str; 2869 FieldTypes[2] = getPointerType(CharTy.withConst()); 2870 // long length; 2871 FieldTypes[3] = LongTy; 2872 2873 // Create fields 2874 for (unsigned i = 0; i < 4; ++i) { 2875 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 2876 SourceLocation(), 0, 2877 FieldTypes[i], /*TInfo=*/0, 2878 /*BitWidth=*/0, 2879 /*Mutable=*/false); 2880 CFConstantStringTypeDecl->addDecl(Field); 2881 } 2882 2883 CFConstantStringTypeDecl->completeDefinition(*this); 2884 } 2885 2886 return getTagDeclType(CFConstantStringTypeDecl); 2887} 2888 2889void ASTContext::setCFConstantStringType(QualType T) { 2890 const RecordType *Rec = T->getAs<RecordType>(); 2891 assert(Rec && "Invalid CFConstantStringType"); 2892 CFConstantStringTypeDecl = Rec->getDecl(); 2893} 2894 2895QualType ASTContext::getObjCFastEnumerationStateType() { 2896 if (!ObjCFastEnumerationStateTypeDecl) { 2897 ObjCFastEnumerationStateTypeDecl = 2898 CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2899 &Idents.get("__objcFastEnumerationState")); 2900 2901 QualType FieldTypes[] = { 2902 UnsignedLongTy, 2903 getPointerType(ObjCIdTypedefType), 2904 getPointerType(UnsignedLongTy), 2905 getConstantArrayType(UnsignedLongTy, 2906 llvm::APInt(32, 5), ArrayType::Normal, 0) 2907 }; 2908 2909 for (size_t i = 0; i < 4; ++i) { 2910 FieldDecl *Field = FieldDecl::Create(*this, 2911 ObjCFastEnumerationStateTypeDecl, 2912 SourceLocation(), 0, 2913 FieldTypes[i], /*TInfo=*/0, 2914 /*BitWidth=*/0, 2915 /*Mutable=*/false); 2916 ObjCFastEnumerationStateTypeDecl->addDecl(Field); 2917 } 2918 2919 ObjCFastEnumerationStateTypeDecl->completeDefinition(*this); 2920 } 2921 2922 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 2923} 2924 2925QualType ASTContext::getBlockDescriptorType() { 2926 if (BlockDescriptorType) 2927 return getTagDeclType(BlockDescriptorType); 2928 2929 RecordDecl *T; 2930 // FIXME: Needs the FlagAppleBlock bit. 2931 T = CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2932 &Idents.get("__block_descriptor")); 2933 2934 QualType FieldTypes[] = { 2935 UnsignedLongTy, 2936 UnsignedLongTy, 2937 }; 2938 2939 const char *FieldNames[] = { 2940 "reserved", 2941 "Size" 2942 }; 2943 2944 for (size_t i = 0; i < 2; ++i) { 2945 FieldDecl *Field = FieldDecl::Create(*this, 2946 T, 2947 SourceLocation(), 2948 &Idents.get(FieldNames[i]), 2949 FieldTypes[i], /*TInfo=*/0, 2950 /*BitWidth=*/0, 2951 /*Mutable=*/false); 2952 T->addDecl(Field); 2953 } 2954 2955 T->completeDefinition(*this); 2956 2957 BlockDescriptorType = T; 2958 2959 return getTagDeclType(BlockDescriptorType); 2960} 2961 2962void ASTContext::setBlockDescriptorType(QualType T) { 2963 const RecordType *Rec = T->getAs<RecordType>(); 2964 assert(Rec && "Invalid BlockDescriptorType"); 2965 BlockDescriptorType = Rec->getDecl(); 2966} 2967 2968QualType ASTContext::getBlockDescriptorExtendedType() { 2969 if (BlockDescriptorExtendedType) 2970 return getTagDeclType(BlockDescriptorExtendedType); 2971 2972 RecordDecl *T; 2973 // FIXME: Needs the FlagAppleBlock bit. 2974 T = CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2975 &Idents.get("__block_descriptor_withcopydispose")); 2976 2977 QualType FieldTypes[] = { 2978 UnsignedLongTy, 2979 UnsignedLongTy, 2980 getPointerType(VoidPtrTy), 2981 getPointerType(VoidPtrTy) 2982 }; 2983 2984 const char *FieldNames[] = { 2985 "reserved", 2986 "Size", 2987 "CopyFuncPtr", 2988 "DestroyFuncPtr" 2989 }; 2990 2991 for (size_t i = 0; i < 4; ++i) { 2992 FieldDecl *Field = FieldDecl::Create(*this, 2993 T, 2994 SourceLocation(), 2995 &Idents.get(FieldNames[i]), 2996 FieldTypes[i], /*TInfo=*/0, 2997 /*BitWidth=*/0, 2998 /*Mutable=*/false); 2999 T->addDecl(Field); 3000 } 3001 3002 T->completeDefinition(*this); 3003 3004 BlockDescriptorExtendedType = T; 3005 3006 return getTagDeclType(BlockDescriptorExtendedType); 3007} 3008 3009void ASTContext::setBlockDescriptorExtendedType(QualType T) { 3010 const RecordType *Rec = T->getAs<RecordType>(); 3011 assert(Rec && "Invalid BlockDescriptorType"); 3012 BlockDescriptorExtendedType = Rec->getDecl(); 3013} 3014 3015bool ASTContext::BlockRequiresCopying(QualType Ty) { 3016 if (Ty->isBlockPointerType()) 3017 return true; 3018 if (isObjCNSObjectType(Ty)) 3019 return true; 3020 if (Ty->isObjCObjectPointerType()) 3021 return true; 3022 return false; 3023} 3024 3025QualType ASTContext::BuildByRefType(const char *DeclName, QualType Ty) { 3026 // type = struct __Block_byref_1_X { 3027 // void *__isa; 3028 // struct __Block_byref_1_X *__forwarding; 3029 // unsigned int __flags; 3030 // unsigned int __size; 3031 // void *__copy_helper; // as needed 3032 // void *__destroy_help // as needed 3033 // int X; 3034 // } * 3035 3036 bool HasCopyAndDispose = BlockRequiresCopying(Ty); 3037 3038 // FIXME: Move up 3039 static unsigned int UniqueBlockByRefTypeID = 0; 3040 llvm::SmallString<36> Name; 3041 llvm::raw_svector_ostream(Name) << "__Block_byref_" << 3042 ++UniqueBlockByRefTypeID << '_' << DeclName; 3043 RecordDecl *T; 3044 T = CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 3045 &Idents.get(Name.str())); 3046 T->startDefinition(); 3047 QualType Int32Ty = IntTy; 3048 assert(getIntWidth(IntTy) == 32 && "non-32bit int not supported"); 3049 QualType FieldTypes[] = { 3050 getPointerType(VoidPtrTy), 3051 getPointerType(getTagDeclType(T)), 3052 Int32Ty, 3053 Int32Ty, 3054 getPointerType(VoidPtrTy), 3055 getPointerType(VoidPtrTy), 3056 Ty 3057 }; 3058 3059 const char *FieldNames[] = { 3060 "__isa", 3061 "__forwarding", 3062 "__flags", 3063 "__size", 3064 "__copy_helper", 3065 "__destroy_helper", 3066 DeclName, 3067 }; 3068 3069 for (size_t i = 0; i < 7; ++i) { 3070 if (!HasCopyAndDispose && i >=4 && i <= 5) 3071 continue; 3072 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3073 &Idents.get(FieldNames[i]), 3074 FieldTypes[i], /*TInfo=*/0, 3075 /*BitWidth=*/0, /*Mutable=*/false); 3076 T->addDecl(Field); 3077 } 3078 3079 T->completeDefinition(*this); 3080 3081 return getPointerType(getTagDeclType(T)); 3082} 3083 3084 3085QualType ASTContext::getBlockParmType( 3086 bool BlockHasCopyDispose, 3087 llvm::SmallVector<const Expr *, 8> &BlockDeclRefDecls) { 3088 // FIXME: Move up 3089 static unsigned int UniqueBlockParmTypeID = 0; 3090 llvm::SmallString<36> Name; 3091 llvm::raw_svector_ostream(Name) << "__block_literal_" 3092 << ++UniqueBlockParmTypeID; 3093 RecordDecl *T; 3094 T = CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 3095 &Idents.get(Name.str())); 3096 QualType FieldTypes[] = { 3097 getPointerType(VoidPtrTy), 3098 IntTy, 3099 IntTy, 3100 getPointerType(VoidPtrTy), 3101 (BlockHasCopyDispose ? 3102 getPointerType(getBlockDescriptorExtendedType()) : 3103 getPointerType(getBlockDescriptorType())) 3104 }; 3105 3106 const char *FieldNames[] = { 3107 "__isa", 3108 "__flags", 3109 "__reserved", 3110 "__FuncPtr", 3111 "__descriptor" 3112 }; 3113 3114 for (size_t i = 0; i < 5; ++i) { 3115 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3116 &Idents.get(FieldNames[i]), 3117 FieldTypes[i], /*TInfo=*/0, 3118 /*BitWidth=*/0, /*Mutable=*/false); 3119 T->addDecl(Field); 3120 } 3121 3122 for (size_t i = 0; i < BlockDeclRefDecls.size(); ++i) { 3123 const Expr *E = BlockDeclRefDecls[i]; 3124 const BlockDeclRefExpr *BDRE = dyn_cast<BlockDeclRefExpr>(E); 3125 clang::IdentifierInfo *Name = 0; 3126 if (BDRE) { 3127 const ValueDecl *D = BDRE->getDecl(); 3128 Name = &Idents.get(D->getName()); 3129 } 3130 QualType FieldType = E->getType(); 3131 3132 if (BDRE && BDRE->isByRef()) 3133 FieldType = BuildByRefType(BDRE->getDecl()->getNameAsCString(), 3134 FieldType); 3135 3136 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3137 Name, FieldType, /*TInfo=*/0, 3138 /*BitWidth=*/0, /*Mutable=*/false); 3139 T->addDecl(Field); 3140 } 3141 3142 T->completeDefinition(*this); 3143 3144 return getPointerType(getTagDeclType(T)); 3145} 3146 3147void ASTContext::setObjCFastEnumerationStateType(QualType T) { 3148 const RecordType *Rec = T->getAs<RecordType>(); 3149 assert(Rec && "Invalid ObjCFAstEnumerationStateType"); 3150 ObjCFastEnumerationStateTypeDecl = Rec->getDecl(); 3151} 3152 3153// This returns true if a type has been typedefed to BOOL: 3154// typedef <type> BOOL; 3155static bool isTypeTypedefedAsBOOL(QualType T) { 3156 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 3157 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 3158 return II->isStr("BOOL"); 3159 3160 return false; 3161} 3162 3163/// getObjCEncodingTypeSize returns size of type for objective-c encoding 3164/// purpose. 3165CharUnits ASTContext::getObjCEncodingTypeSize(QualType type) { 3166 CharUnits sz = getTypeSizeInChars(type); 3167 3168 // Make all integer and enum types at least as large as an int 3169 if (sz.isPositive() && type->isIntegralType()) 3170 sz = std::max(sz, getTypeSizeInChars(IntTy)); 3171 // Treat arrays as pointers, since that's how they're passed in. 3172 else if (type->isArrayType()) 3173 sz = getTypeSizeInChars(VoidPtrTy); 3174 return sz; 3175} 3176 3177static inline 3178std::string charUnitsToString(const CharUnits &CU) { 3179 return llvm::itostr(CU.getQuantity()); 3180} 3181 3182/// getObjCEncodingForBlockDecl - Return the encoded type for this method 3183/// declaration. 3184void ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr, 3185 std::string& S) { 3186 const BlockDecl *Decl = Expr->getBlockDecl(); 3187 QualType BlockTy = 3188 Expr->getType()->getAs<BlockPointerType>()->getPointeeType(); 3189 // Encode result type. 3190 getObjCEncodingForType(cast<FunctionType>(BlockTy)->getResultType(), S); 3191 // Compute size of all parameters. 3192 // Start with computing size of a pointer in number of bytes. 3193 // FIXME: There might(should) be a better way of doing this computation! 3194 SourceLocation Loc; 3195 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3196 CharUnits ParmOffset = PtrSize; 3197 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3198 E = Decl->param_end(); PI != E; ++PI) { 3199 QualType PType = (*PI)->getType(); 3200 CharUnits sz = getObjCEncodingTypeSize(PType); 3201 assert (sz.isPositive() && "BlockExpr - Incomplete param type"); 3202 ParmOffset += sz; 3203 } 3204 // Size of the argument frame 3205 S += charUnitsToString(ParmOffset); 3206 // Block pointer and offset. 3207 S += "@?0"; 3208 ParmOffset = PtrSize; 3209 3210 // Argument types. 3211 ParmOffset = PtrSize; 3212 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E = 3213 Decl->param_end(); PI != E; ++PI) { 3214 ParmVarDecl *PVDecl = *PI; 3215 QualType PType = PVDecl->getOriginalType(); 3216 if (const ArrayType *AT = 3217 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3218 // Use array's original type only if it has known number of 3219 // elements. 3220 if (!isa<ConstantArrayType>(AT)) 3221 PType = PVDecl->getType(); 3222 } else if (PType->isFunctionType()) 3223 PType = PVDecl->getType(); 3224 getObjCEncodingForType(PType, S); 3225 S += charUnitsToString(ParmOffset); 3226 ParmOffset += getObjCEncodingTypeSize(PType); 3227 } 3228} 3229 3230/// getObjCEncodingForMethodDecl - Return the encoded type for this method 3231/// declaration. 3232void ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 3233 std::string& S) { 3234 // FIXME: This is not very efficient. 3235 // Encode type qualifer, 'in', 'inout', etc. for the return type. 3236 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S); 3237 // Encode result type. 3238 getObjCEncodingForType(Decl->getResultType(), S); 3239 // Compute size of all parameters. 3240 // Start with computing size of a pointer in number of bytes. 3241 // FIXME: There might(should) be a better way of doing this computation! 3242 SourceLocation Loc; 3243 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3244 // The first two arguments (self and _cmd) are pointers; account for 3245 // their size. 3246 CharUnits ParmOffset = 2 * PtrSize; 3247 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3248 E = Decl->param_end(); PI != E; ++PI) { 3249 QualType PType = (*PI)->getType(); 3250 CharUnits sz = getObjCEncodingTypeSize(PType); 3251 assert (sz.isPositive() && 3252 "getObjCEncodingForMethodDecl - Incomplete param type"); 3253 ParmOffset += sz; 3254 } 3255 S += charUnitsToString(ParmOffset); 3256 S += "@0:"; 3257 S += charUnitsToString(PtrSize); 3258 3259 // Argument types. 3260 ParmOffset = 2 * PtrSize; 3261 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3262 E = Decl->param_end(); PI != E; ++PI) { 3263 ParmVarDecl *PVDecl = *PI; 3264 QualType PType = PVDecl->getOriginalType(); 3265 if (const ArrayType *AT = 3266 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3267 // Use array's original type only if it has known number of 3268 // elements. 3269 if (!isa<ConstantArrayType>(AT)) 3270 PType = PVDecl->getType(); 3271 } else if (PType->isFunctionType()) 3272 PType = PVDecl->getType(); 3273 // Process argument qualifiers for user supplied arguments; such as, 3274 // 'in', 'inout', etc. 3275 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S); 3276 getObjCEncodingForType(PType, S); 3277 S += charUnitsToString(ParmOffset); 3278 ParmOffset += getObjCEncodingTypeSize(PType); 3279 } 3280} 3281 3282/// getObjCEncodingForPropertyDecl - Return the encoded type for this 3283/// property declaration. If non-NULL, Container must be either an 3284/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 3285/// NULL when getting encodings for protocol properties. 3286/// Property attributes are stored as a comma-delimited C string. The simple 3287/// attributes readonly and bycopy are encoded as single characters. The 3288/// parametrized attributes, getter=name, setter=name, and ivar=name, are 3289/// encoded as single characters, followed by an identifier. Property types 3290/// are also encoded as a parametrized attribute. The characters used to encode 3291/// these attributes are defined by the following enumeration: 3292/// @code 3293/// enum PropertyAttributes { 3294/// kPropertyReadOnly = 'R', // property is read-only. 3295/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 3296/// kPropertyByref = '&', // property is a reference to the value last assigned 3297/// kPropertyDynamic = 'D', // property is dynamic 3298/// kPropertyGetter = 'G', // followed by getter selector name 3299/// kPropertySetter = 'S', // followed by setter selector name 3300/// kPropertyInstanceVariable = 'V' // followed by instance variable name 3301/// kPropertyType = 't' // followed by old-style type encoding. 3302/// kPropertyWeak = 'W' // 'weak' property 3303/// kPropertyStrong = 'P' // property GC'able 3304/// kPropertyNonAtomic = 'N' // property non-atomic 3305/// }; 3306/// @endcode 3307void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 3308 const Decl *Container, 3309 std::string& S) { 3310 // Collect information from the property implementation decl(s). 3311 bool Dynamic = false; 3312 ObjCPropertyImplDecl *SynthesizePID = 0; 3313 3314 // FIXME: Duplicated code due to poor abstraction. 3315 if (Container) { 3316 if (const ObjCCategoryImplDecl *CID = 3317 dyn_cast<ObjCCategoryImplDecl>(Container)) { 3318 for (ObjCCategoryImplDecl::propimpl_iterator 3319 i = CID->propimpl_begin(), e = CID->propimpl_end(); 3320 i != e; ++i) { 3321 ObjCPropertyImplDecl *PID = *i; 3322 if (PID->getPropertyDecl() == PD) { 3323 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3324 Dynamic = true; 3325 } else { 3326 SynthesizePID = PID; 3327 } 3328 } 3329 } 3330 } else { 3331 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 3332 for (ObjCCategoryImplDecl::propimpl_iterator 3333 i = OID->propimpl_begin(), e = OID->propimpl_end(); 3334 i != e; ++i) { 3335 ObjCPropertyImplDecl *PID = *i; 3336 if (PID->getPropertyDecl() == PD) { 3337 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3338 Dynamic = true; 3339 } else { 3340 SynthesizePID = PID; 3341 } 3342 } 3343 } 3344 } 3345 } 3346 3347 // FIXME: This is not very efficient. 3348 S = "T"; 3349 3350 // Encode result type. 3351 // GCC has some special rules regarding encoding of properties which 3352 // closely resembles encoding of ivars. 3353 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 3354 true /* outermost type */, 3355 true /* encoding for property */); 3356 3357 if (PD->isReadOnly()) { 3358 S += ",R"; 3359 } else { 3360 switch (PD->getSetterKind()) { 3361 case ObjCPropertyDecl::Assign: break; 3362 case ObjCPropertyDecl::Copy: S += ",C"; break; 3363 case ObjCPropertyDecl::Retain: S += ",&"; break; 3364 } 3365 } 3366 3367 // It really isn't clear at all what this means, since properties 3368 // are "dynamic by default". 3369 if (Dynamic) 3370 S += ",D"; 3371 3372 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 3373 S += ",N"; 3374 3375 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 3376 S += ",G"; 3377 S += PD->getGetterName().getAsString(); 3378 } 3379 3380 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 3381 S += ",S"; 3382 S += PD->getSetterName().getAsString(); 3383 } 3384 3385 if (SynthesizePID) { 3386 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 3387 S += ",V"; 3388 S += OID->getNameAsString(); 3389 } 3390 3391 // FIXME: OBJCGC: weak & strong 3392} 3393 3394/// getLegacyIntegralTypeEncoding - 3395/// Another legacy compatibility encoding: 32-bit longs are encoded as 3396/// 'l' or 'L' , but not always. For typedefs, we need to use 3397/// 'i' or 'I' instead if encoding a struct field, or a pointer! 3398/// 3399void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 3400 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 3401 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) { 3402 if (BT->getKind() == BuiltinType::ULong && 3403 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3404 PointeeTy = UnsignedIntTy; 3405 else 3406 if (BT->getKind() == BuiltinType::Long && 3407 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3408 PointeeTy = IntTy; 3409 } 3410 } 3411} 3412 3413void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 3414 const FieldDecl *Field) { 3415 // We follow the behavior of gcc, expanding structures which are 3416 // directly pointed to, and expanding embedded structures. Note that 3417 // these rules are sufficient to prevent recursive encoding of the 3418 // same type. 3419 getObjCEncodingForTypeImpl(T, S, true, true, Field, 3420 true /* outermost type */); 3421} 3422 3423static void EncodeBitField(const ASTContext *Context, std::string& S, 3424 const FieldDecl *FD) { 3425 const Expr *E = FD->getBitWidth(); 3426 assert(E && "bitfield width not there - getObjCEncodingForTypeImpl"); 3427 ASTContext *Ctx = const_cast<ASTContext*>(Context); 3428 unsigned N = E->EvaluateAsInt(*Ctx).getZExtValue(); 3429 S += 'b'; 3430 S += llvm::utostr(N); 3431} 3432 3433// FIXME: Use SmallString for accumulating string. 3434void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 3435 bool ExpandPointedToStructures, 3436 bool ExpandStructures, 3437 const FieldDecl *FD, 3438 bool OutermostType, 3439 bool EncodingProperty) { 3440 if (const BuiltinType *BT = T->getAs<BuiltinType>()) { 3441 if (FD && FD->isBitField()) 3442 return EncodeBitField(this, S, FD); 3443 char encoding; 3444 switch (BT->getKind()) { 3445 default: assert(0 && "Unhandled builtin type kind"); 3446 case BuiltinType::Void: encoding = 'v'; break; 3447 case BuiltinType::Bool: encoding = 'B'; break; 3448 case BuiltinType::Char_U: 3449 case BuiltinType::UChar: encoding = 'C'; break; 3450 case BuiltinType::UShort: encoding = 'S'; break; 3451 case BuiltinType::UInt: encoding = 'I'; break; 3452 case BuiltinType::ULong: 3453 encoding = 3454 (const_cast<ASTContext *>(this))->getIntWidth(T) == 32 ? 'L' : 'Q'; 3455 break; 3456 case BuiltinType::UInt128: encoding = 'T'; break; 3457 case BuiltinType::ULongLong: encoding = 'Q'; break; 3458 case BuiltinType::Char_S: 3459 case BuiltinType::SChar: encoding = 'c'; break; 3460 case BuiltinType::Short: encoding = 's'; break; 3461 case BuiltinType::Int: encoding = 'i'; break; 3462 case BuiltinType::Long: 3463 encoding = 3464 (const_cast<ASTContext *>(this))->getIntWidth(T) == 32 ? 'l' : 'q'; 3465 break; 3466 case BuiltinType::LongLong: encoding = 'q'; break; 3467 case BuiltinType::Int128: encoding = 't'; break; 3468 case BuiltinType::Float: encoding = 'f'; break; 3469 case BuiltinType::Double: encoding = 'd'; break; 3470 case BuiltinType::LongDouble: encoding = 'd'; break; 3471 } 3472 3473 S += encoding; 3474 return; 3475 } 3476 3477 if (const ComplexType *CT = T->getAs<ComplexType>()) { 3478 S += 'j'; 3479 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 3480 false); 3481 return; 3482 } 3483 3484 if (const PointerType *PT = T->getAs<PointerType>()) { 3485 if (PT->isObjCSelType()) { 3486 S += ':'; 3487 return; 3488 } 3489 QualType PointeeTy = PT->getPointeeType(); 3490 3491 bool isReadOnly = false; 3492 // For historical/compatibility reasons, the read-only qualifier of the 3493 // pointee gets emitted _before_ the '^'. The read-only qualifier of 3494 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 3495 // Also, do not emit the 'r' for anything but the outermost type! 3496 if (isa<TypedefType>(T.getTypePtr())) { 3497 if (OutermostType && T.isConstQualified()) { 3498 isReadOnly = true; 3499 S += 'r'; 3500 } 3501 } else if (OutermostType) { 3502 QualType P = PointeeTy; 3503 while (P->getAs<PointerType>()) 3504 P = P->getAs<PointerType>()->getPointeeType(); 3505 if (P.isConstQualified()) { 3506 isReadOnly = true; 3507 S += 'r'; 3508 } 3509 } 3510 if (isReadOnly) { 3511 // Another legacy compatibility encoding. Some ObjC qualifier and type 3512 // combinations need to be rearranged. 3513 // Rewrite "in const" from "nr" to "rn" 3514 const char * s = S.c_str(); 3515 int len = S.length(); 3516 if (len >= 2 && s[len-2] == 'n' && s[len-1] == 'r') { 3517 std::string replace = "rn"; 3518 S.replace(S.end()-2, S.end(), replace); 3519 } 3520 } 3521 3522 if (PointeeTy->isCharType()) { 3523 // char pointer types should be encoded as '*' unless it is a 3524 // type that has been typedef'd to 'BOOL'. 3525 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 3526 S += '*'; 3527 return; 3528 } 3529 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) { 3530 // GCC binary compat: Need to convert "struct objc_class *" to "#". 3531 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 3532 S += '#'; 3533 return; 3534 } 3535 // GCC binary compat: Need to convert "struct objc_object *" to "@". 3536 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 3537 S += '@'; 3538 return; 3539 } 3540 // fall through... 3541 } 3542 S += '^'; 3543 getLegacyIntegralTypeEncoding(PointeeTy); 3544 3545 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 3546 NULL); 3547 return; 3548 } 3549 3550 if (const ArrayType *AT = 3551 // Ignore type qualifiers etc. 3552 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 3553 if (isa<IncompleteArrayType>(AT)) { 3554 // Incomplete arrays are encoded as a pointer to the array element. 3555 S += '^'; 3556 3557 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3558 false, ExpandStructures, FD); 3559 } else { 3560 S += '['; 3561 3562 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 3563 S += llvm::utostr(CAT->getSize().getZExtValue()); 3564 else { 3565 //Variable length arrays are encoded as a regular array with 0 elements. 3566 assert(isa<VariableArrayType>(AT) && "Unknown array type!"); 3567 S += '0'; 3568 } 3569 3570 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3571 false, ExpandStructures, FD); 3572 S += ']'; 3573 } 3574 return; 3575 } 3576 3577 if (T->getAs<FunctionType>()) { 3578 S += '?'; 3579 return; 3580 } 3581 3582 if (const RecordType *RTy = T->getAs<RecordType>()) { 3583 RecordDecl *RDecl = RTy->getDecl(); 3584 S += RDecl->isUnion() ? '(' : '{'; 3585 // Anonymous structures print as '?' 3586 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 3587 S += II->getName(); 3588 } else { 3589 S += '?'; 3590 } 3591 if (ExpandStructures) { 3592 S += '='; 3593 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 3594 FieldEnd = RDecl->field_end(); 3595 Field != FieldEnd; ++Field) { 3596 if (FD) { 3597 S += '"'; 3598 S += Field->getNameAsString(); 3599 S += '"'; 3600 } 3601 3602 // Special case bit-fields. 3603 if (Field->isBitField()) { 3604 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 3605 (*Field)); 3606 } else { 3607 QualType qt = Field->getType(); 3608 getLegacyIntegralTypeEncoding(qt); 3609 getObjCEncodingForTypeImpl(qt, S, false, true, 3610 FD); 3611 } 3612 } 3613 } 3614 S += RDecl->isUnion() ? ')' : '}'; 3615 return; 3616 } 3617 3618 if (T->isEnumeralType()) { 3619 if (FD && FD->isBitField()) 3620 EncodeBitField(this, S, FD); 3621 else 3622 S += 'i'; 3623 return; 3624 } 3625 3626 if (T->isBlockPointerType()) { 3627 S += "@?"; // Unlike a pointer-to-function, which is "^?". 3628 return; 3629 } 3630 3631 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) { 3632 // @encode(class_name) 3633 ObjCInterfaceDecl *OI = OIT->getDecl(); 3634 S += '{'; 3635 const IdentifierInfo *II = OI->getIdentifier(); 3636 S += II->getName(); 3637 S += '='; 3638 llvm::SmallVector<FieldDecl*, 32> RecFields; 3639 CollectObjCIvars(OI, RecFields); 3640 for (unsigned i = 0, e = RecFields.size(); i != e; ++i) { 3641 if (RecFields[i]->isBitField()) 3642 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3643 RecFields[i]); 3644 else 3645 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3646 FD); 3647 } 3648 S += '}'; 3649 return; 3650 } 3651 3652 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) { 3653 if (OPT->isObjCIdType()) { 3654 S += '@'; 3655 return; 3656 } 3657 3658 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) { 3659 // FIXME: Consider if we need to output qualifiers for 'Class<p>'. 3660 // Since this is a binary compatibility issue, need to consult with runtime 3661 // folks. Fortunately, this is a *very* obsure construct. 3662 S += '#'; 3663 return; 3664 } 3665 3666 if (OPT->isObjCQualifiedIdType()) { 3667 getObjCEncodingForTypeImpl(getObjCIdType(), S, 3668 ExpandPointedToStructures, 3669 ExpandStructures, FD); 3670 if (FD || EncodingProperty) { 3671 // Note that we do extended encoding of protocol qualifer list 3672 // Only when doing ivar or property encoding. 3673 S += '"'; 3674 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3675 E = OPT->qual_end(); I != E; ++I) { 3676 S += '<'; 3677 S += (*I)->getNameAsString(); 3678 S += '>'; 3679 } 3680 S += '"'; 3681 } 3682 return; 3683 } 3684 3685 QualType PointeeTy = OPT->getPointeeType(); 3686 if (!EncodingProperty && 3687 isa<TypedefType>(PointeeTy.getTypePtr())) { 3688 // Another historical/compatibility reason. 3689 // We encode the underlying type which comes out as 3690 // {...}; 3691 S += '^'; 3692 getObjCEncodingForTypeImpl(PointeeTy, S, 3693 false, ExpandPointedToStructures, 3694 NULL); 3695 return; 3696 } 3697 3698 S += '@'; 3699 if (OPT->getInterfaceDecl() && (FD || EncodingProperty)) { 3700 S += '"'; 3701 S += OPT->getInterfaceDecl()->getIdentifier()->getName(); 3702 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3703 E = OPT->qual_end(); I != E; ++I) { 3704 S += '<'; 3705 S += (*I)->getNameAsString(); 3706 S += '>'; 3707 } 3708 S += '"'; 3709 } 3710 return; 3711 } 3712 3713 assert(0 && "@encode for type not implemented!"); 3714} 3715 3716void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 3717 std::string& S) const { 3718 if (QT & Decl::OBJC_TQ_In) 3719 S += 'n'; 3720 if (QT & Decl::OBJC_TQ_Inout) 3721 S += 'N'; 3722 if (QT & Decl::OBJC_TQ_Out) 3723 S += 'o'; 3724 if (QT & Decl::OBJC_TQ_Bycopy) 3725 S += 'O'; 3726 if (QT & Decl::OBJC_TQ_Byref) 3727 S += 'R'; 3728 if (QT & Decl::OBJC_TQ_Oneway) 3729 S += 'V'; 3730} 3731 3732void ASTContext::setBuiltinVaListType(QualType T) { 3733 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 3734 3735 BuiltinVaListType = T; 3736} 3737 3738void ASTContext::setObjCIdType(QualType T) { 3739 ObjCIdTypedefType = T; 3740} 3741 3742void ASTContext::setObjCSelType(QualType T) { 3743 ObjCSelTypedefType = T; 3744} 3745 3746void ASTContext::setObjCProtoType(QualType QT) { 3747 ObjCProtoType = QT; 3748} 3749 3750void ASTContext::setObjCClassType(QualType T) { 3751 ObjCClassTypedefType = T; 3752} 3753 3754void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 3755 assert(ObjCConstantStringType.isNull() && 3756 "'NSConstantString' type already set!"); 3757 3758 ObjCConstantStringType = getObjCInterfaceType(Decl); 3759} 3760 3761/// \brief Retrieve the template name that corresponds to a non-empty 3762/// lookup. 3763TemplateName ASTContext::getOverloadedTemplateName(UnresolvedSetIterator Begin, 3764 UnresolvedSetIterator End) { 3765 unsigned size = End - Begin; 3766 assert(size > 1 && "set is not overloaded!"); 3767 3768 void *memory = Allocate(sizeof(OverloadedTemplateStorage) + 3769 size * sizeof(FunctionTemplateDecl*)); 3770 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size); 3771 3772 NamedDecl **Storage = OT->getStorage(); 3773 for (UnresolvedSetIterator I = Begin; I != End; ++I) { 3774 NamedDecl *D = *I; 3775 assert(isa<FunctionTemplateDecl>(D) || 3776 (isa<UsingShadowDecl>(D) && 3777 isa<FunctionTemplateDecl>(D->getUnderlyingDecl()))); 3778 *Storage++ = D; 3779 } 3780 3781 return TemplateName(OT); 3782} 3783 3784/// \brief Retrieve the template name that represents a qualified 3785/// template name such as \c std::vector. 3786TemplateName ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 3787 bool TemplateKeyword, 3788 TemplateDecl *Template) { 3789 llvm::FoldingSetNodeID ID; 3790 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 3791 3792 void *InsertPos = 0; 3793 QualifiedTemplateName *QTN = 3794 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3795 if (!QTN) { 3796 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 3797 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 3798 } 3799 3800 return TemplateName(QTN); 3801} 3802 3803/// \brief Retrieve the template name that represents a dependent 3804/// template name such as \c MetaFun::template apply. 3805TemplateName ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 3806 const IdentifierInfo *Name) { 3807 assert((!NNS || NNS->isDependent()) && 3808 "Nested name specifier must be dependent"); 3809 3810 llvm::FoldingSetNodeID ID; 3811 DependentTemplateName::Profile(ID, NNS, Name); 3812 3813 void *InsertPos = 0; 3814 DependentTemplateName *QTN = 3815 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3816 3817 if (QTN) 3818 return TemplateName(QTN); 3819 3820 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 3821 if (CanonNNS == NNS) { 3822 QTN = new (*this,4) DependentTemplateName(NNS, Name); 3823 } else { 3824 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 3825 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 3826 } 3827 3828 DependentTemplateNames.InsertNode(QTN, InsertPos); 3829 return TemplateName(QTN); 3830} 3831 3832/// \brief Retrieve the template name that represents a dependent 3833/// template name such as \c MetaFun::template operator+. 3834TemplateName 3835ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 3836 OverloadedOperatorKind Operator) { 3837 assert((!NNS || NNS->isDependent()) && 3838 "Nested name specifier must be dependent"); 3839 3840 llvm::FoldingSetNodeID ID; 3841 DependentTemplateName::Profile(ID, NNS, Operator); 3842 3843 void *InsertPos = 0; 3844 DependentTemplateName *QTN = 3845 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3846 3847 if (QTN) 3848 return TemplateName(QTN); 3849 3850 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 3851 if (CanonNNS == NNS) { 3852 QTN = new (*this,4) DependentTemplateName(NNS, Operator); 3853 } else { 3854 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator); 3855 QTN = new (*this,4) DependentTemplateName(NNS, Operator, Canon); 3856 } 3857 3858 DependentTemplateNames.InsertNode(QTN, InsertPos); 3859 return TemplateName(QTN); 3860} 3861 3862/// getFromTargetType - Given one of the integer types provided by 3863/// TargetInfo, produce the corresponding type. The unsigned @p Type 3864/// is actually a value of type @c TargetInfo::IntType. 3865CanQualType ASTContext::getFromTargetType(unsigned Type) const { 3866 switch (Type) { 3867 case TargetInfo::NoInt: return CanQualType(); 3868 case TargetInfo::SignedShort: return ShortTy; 3869 case TargetInfo::UnsignedShort: return UnsignedShortTy; 3870 case TargetInfo::SignedInt: return IntTy; 3871 case TargetInfo::UnsignedInt: return UnsignedIntTy; 3872 case TargetInfo::SignedLong: return LongTy; 3873 case TargetInfo::UnsignedLong: return UnsignedLongTy; 3874 case TargetInfo::SignedLongLong: return LongLongTy; 3875 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 3876 } 3877 3878 assert(false && "Unhandled TargetInfo::IntType value"); 3879 return CanQualType(); 3880} 3881 3882//===----------------------------------------------------------------------===// 3883// Type Predicates. 3884//===----------------------------------------------------------------------===// 3885 3886/// isObjCNSObjectType - Return true if this is an NSObject object using 3887/// NSObject attribute on a c-style pointer type. 3888/// FIXME - Make it work directly on types. 3889/// FIXME: Move to Type. 3890/// 3891bool ASTContext::isObjCNSObjectType(QualType Ty) const { 3892 if (TypedefType *TDT = dyn_cast<TypedefType>(Ty)) { 3893 if (TypedefDecl *TD = TDT->getDecl()) 3894 if (TD->getAttr<ObjCNSObjectAttr>()) 3895 return true; 3896 } 3897 return false; 3898} 3899 3900/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 3901/// garbage collection attribute. 3902/// 3903Qualifiers::GC ASTContext::getObjCGCAttrKind(const QualType &Ty) const { 3904 Qualifiers::GC GCAttrs = Qualifiers::GCNone; 3905 if (getLangOptions().ObjC1 && 3906 getLangOptions().getGCMode() != LangOptions::NonGC) { 3907 GCAttrs = Ty.getObjCGCAttr(); 3908 // Default behavious under objective-c's gc is for objective-c pointers 3909 // (or pointers to them) be treated as though they were declared 3910 // as __strong. 3911 if (GCAttrs == Qualifiers::GCNone) { 3912 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 3913 GCAttrs = Qualifiers::Strong; 3914 else if (Ty->isPointerType()) 3915 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType()); 3916 } 3917 // Non-pointers have none gc'able attribute regardless of the attribute 3918 // set on them. 3919 else if (!Ty->isAnyPointerType() && !Ty->isBlockPointerType()) 3920 return Qualifiers::GCNone; 3921 } 3922 return GCAttrs; 3923} 3924 3925//===----------------------------------------------------------------------===// 3926// Type Compatibility Testing 3927//===----------------------------------------------------------------------===// 3928 3929/// areCompatVectorTypes - Return true if the two specified vector types are 3930/// compatible. 3931static bool areCompatVectorTypes(const VectorType *LHS, 3932 const VectorType *RHS) { 3933 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified()); 3934 return LHS->getElementType() == RHS->getElementType() && 3935 LHS->getNumElements() == RHS->getNumElements(); 3936} 3937 3938//===----------------------------------------------------------------------===// 3939// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 3940//===----------------------------------------------------------------------===// 3941 3942/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 3943/// inheritance hierarchy of 'rProto'. 3944bool ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 3945 ObjCProtocolDecl *rProto) { 3946 if (lProto == rProto) 3947 return true; 3948 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 3949 E = rProto->protocol_end(); PI != E; ++PI) 3950 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 3951 return true; 3952 return false; 3953} 3954 3955/// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...> 3956/// return true if lhs's protocols conform to rhs's protocol; false 3957/// otherwise. 3958bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 3959 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 3960 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 3961 return false; 3962} 3963 3964/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 3965/// ObjCQualifiedIDType. 3966bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 3967 bool compare) { 3968 // Allow id<P..> and an 'id' or void* type in all cases. 3969 if (lhs->isVoidPointerType() || 3970 lhs->isObjCIdType() || lhs->isObjCClassType()) 3971 return true; 3972 else if (rhs->isVoidPointerType() || 3973 rhs->isObjCIdType() || rhs->isObjCClassType()) 3974 return true; 3975 3976 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 3977 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 3978 3979 if (!rhsOPT) return false; 3980 3981 if (rhsOPT->qual_empty()) { 3982 // If the RHS is a unqualified interface pointer "NSString*", 3983 // make sure we check the class hierarchy. 3984 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 3985 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 3986 E = lhsQID->qual_end(); I != E; ++I) { 3987 // when comparing an id<P> on lhs with a static type on rhs, 3988 // see if static class implements all of id's protocols, directly or 3989 // through its super class and categories. 3990 if (!rhsID->ClassImplementsProtocol(*I, true)) 3991 return false; 3992 } 3993 } 3994 // If there are no qualifiers and no interface, we have an 'id'. 3995 return true; 3996 } 3997 // Both the right and left sides have qualifiers. 3998 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 3999 E = lhsQID->qual_end(); I != E; ++I) { 4000 ObjCProtocolDecl *lhsProto = *I; 4001 bool match = false; 4002 4003 // when comparing an id<P> on lhs with a static type on rhs, 4004 // see if static class implements all of id's protocols, directly or 4005 // through its super class and categories. 4006 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4007 E = rhsOPT->qual_end(); J != E; ++J) { 4008 ObjCProtocolDecl *rhsProto = *J; 4009 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4010 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4011 match = true; 4012 break; 4013 } 4014 } 4015 // If the RHS is a qualified interface pointer "NSString<P>*", 4016 // make sure we check the class hierarchy. 4017 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4018 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4019 E = lhsQID->qual_end(); I != E; ++I) { 4020 // when comparing an id<P> on lhs with a static type on rhs, 4021 // see if static class implements all of id's protocols, directly or 4022 // through its super class and categories. 4023 if (rhsID->ClassImplementsProtocol(*I, true)) { 4024 match = true; 4025 break; 4026 } 4027 } 4028 } 4029 if (!match) 4030 return false; 4031 } 4032 4033 return true; 4034 } 4035 4036 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 4037 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 4038 4039 if (const ObjCObjectPointerType *lhsOPT = 4040 lhs->getAsObjCInterfacePointerType()) { 4041 if (lhsOPT->qual_empty()) { 4042 bool match = false; 4043 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 4044 for (ObjCObjectPointerType::qual_iterator I = rhsQID->qual_begin(), 4045 E = rhsQID->qual_end(); I != E; ++I) { 4046 // when comparing an id<P> on lhs with a static type on rhs, 4047 // see if static class implements all of id's protocols, directly or 4048 // through its super class and categories. 4049 if (lhsID->ClassImplementsProtocol(*I, true)) { 4050 match = true; 4051 break; 4052 } 4053 } 4054 if (!match) 4055 return false; 4056 } 4057 return true; 4058 } 4059 // Both the right and left sides have qualifiers. 4060 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 4061 E = lhsOPT->qual_end(); I != E; ++I) { 4062 ObjCProtocolDecl *lhsProto = *I; 4063 bool match = false; 4064 4065 // when comparing an id<P> on lhs with a static type on rhs, 4066 // see if static class implements all of id's protocols, directly or 4067 // through its super class and categories. 4068 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 4069 E = rhsQID->qual_end(); J != E; ++J) { 4070 ObjCProtocolDecl *rhsProto = *J; 4071 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4072 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4073 match = true; 4074 break; 4075 } 4076 } 4077 if (!match) 4078 return false; 4079 } 4080 return true; 4081 } 4082 return false; 4083} 4084 4085/// canAssignObjCInterfaces - Return true if the two interface types are 4086/// compatible for assignment from RHS to LHS. This handles validation of any 4087/// protocol qualifiers on the LHS or RHS. 4088/// 4089bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 4090 const ObjCObjectPointerType *RHSOPT) { 4091 // If either type represents the built-in 'id' or 'Class' types, return true. 4092 if (LHSOPT->isObjCBuiltinType() || RHSOPT->isObjCBuiltinType()) 4093 return true; 4094 4095 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 4096 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4097 QualType(RHSOPT,0), 4098 false); 4099 4100 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4101 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4102 if (LHS && RHS) // We have 2 user-defined types. 4103 return canAssignObjCInterfaces(LHS, RHS); 4104 4105 return false; 4106} 4107 4108/// getIntersectionOfProtocols - This routine finds the intersection of set 4109/// of protocols inherited from two distinct objective-c pointer objects. 4110/// It is used to build composite qualifier list of the composite type of 4111/// the conditional expression involving two objective-c pointer objects. 4112static 4113void getIntersectionOfProtocols(ASTContext &Context, 4114 const ObjCObjectPointerType *LHSOPT, 4115 const ObjCObjectPointerType *RHSOPT, 4116 llvm::SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) { 4117 4118 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4119 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4120 4121 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet; 4122 unsigned LHSNumProtocols = LHS->getNumProtocols(); 4123 if (LHSNumProtocols > 0) 4124 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end()); 4125 else { 4126 llvm::SmallVector<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 4127 Context.CollectInheritedProtocols(LHS->getDecl(), LHSInheritedProtocols); 4128 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(), 4129 LHSInheritedProtocols.end()); 4130 } 4131 4132 unsigned RHSNumProtocols = RHS->getNumProtocols(); 4133 if (RHSNumProtocols > 0) { 4134 ObjCProtocolDecl **RHSProtocols = (ObjCProtocolDecl **)RHS->qual_begin(); 4135 for (unsigned i = 0; i < RHSNumProtocols; ++i) 4136 if (InheritedProtocolSet.count(RHSProtocols[i])) 4137 IntersectionOfProtocols.push_back(RHSProtocols[i]); 4138 } 4139 else { 4140 llvm::SmallVector<ObjCProtocolDecl *, 8> RHSInheritedProtocols; 4141 Context.CollectInheritedProtocols(RHS->getDecl(), RHSInheritedProtocols); 4142 // FIXME. This may cause duplication of protocols in the list, but should 4143 // be harmless. 4144 for (unsigned i = 0, len = RHSInheritedProtocols.size(); i < len; ++i) 4145 if (InheritedProtocolSet.count(RHSInheritedProtocols[i])) 4146 IntersectionOfProtocols.push_back(RHSInheritedProtocols[i]); 4147 } 4148} 4149 4150/// areCommonBaseCompatible - Returns common base class of the two classes if 4151/// one found. Note that this is O'2 algorithm. But it will be called as the 4152/// last type comparison in a ?-exp of ObjC pointer types before a 4153/// warning is issued. So, its invokation is extremely rare. 4154QualType ASTContext::areCommonBaseCompatible( 4155 const ObjCObjectPointerType *LHSOPT, 4156 const ObjCObjectPointerType *RHSOPT) { 4157 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4158 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4159 if (!LHS || !RHS) 4160 return QualType(); 4161 4162 while (const ObjCInterfaceDecl *LHSIDecl = LHS->getDecl()->getSuperClass()) { 4163 QualType LHSTy = getObjCInterfaceType(LHSIDecl); 4164 LHS = LHSTy->getAs<ObjCInterfaceType>(); 4165 if (canAssignObjCInterfaces(LHS, RHS)) { 4166 llvm::SmallVector<ObjCProtocolDecl *, 8> IntersectionOfProtocols; 4167 getIntersectionOfProtocols(*this, 4168 LHSOPT, RHSOPT, IntersectionOfProtocols); 4169 if (IntersectionOfProtocols.empty()) 4170 LHSTy = getObjCObjectPointerType(LHSTy); 4171 else 4172 LHSTy = getObjCObjectPointerType(LHSTy, &IntersectionOfProtocols[0], 4173 IntersectionOfProtocols.size()); 4174 return LHSTy; 4175 } 4176 } 4177 4178 return QualType(); 4179} 4180 4181bool ASTContext::canAssignObjCInterfaces(const ObjCInterfaceType *LHS, 4182 const ObjCInterfaceType *RHS) { 4183 // Verify that the base decls are compatible: the RHS must be a subclass of 4184 // the LHS. 4185 if (!LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 4186 return false; 4187 4188 // RHS must have a superset of the protocols in the LHS. If the LHS is not 4189 // protocol qualified at all, then we are good. 4190 if (LHS->getNumProtocols() == 0) 4191 return true; 4192 4193 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, then it 4194 // isn't a superset. 4195 if (RHS->getNumProtocols() == 0) 4196 return true; // FIXME: should return false! 4197 4198 for (ObjCInterfaceType::qual_iterator LHSPI = LHS->qual_begin(), 4199 LHSPE = LHS->qual_end(); 4200 LHSPI != LHSPE; LHSPI++) { 4201 bool RHSImplementsProtocol = false; 4202 4203 // If the RHS doesn't implement the protocol on the left, the types 4204 // are incompatible. 4205 for (ObjCInterfaceType::qual_iterator RHSPI = RHS->qual_begin(), 4206 RHSPE = RHS->qual_end(); 4207 RHSPI != RHSPE; RHSPI++) { 4208 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 4209 RHSImplementsProtocol = true; 4210 break; 4211 } 4212 } 4213 // FIXME: For better diagnostics, consider passing back the protocol name. 4214 if (!RHSImplementsProtocol) 4215 return false; 4216 } 4217 // The RHS implements all protocols listed on the LHS. 4218 return true; 4219} 4220 4221bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 4222 // get the "pointed to" types 4223 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>(); 4224 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>(); 4225 4226 if (!LHSOPT || !RHSOPT) 4227 return false; 4228 4229 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 4230 canAssignObjCInterfaces(RHSOPT, LHSOPT); 4231} 4232 4233/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 4234/// both shall have the identically qualified version of a compatible type. 4235/// C99 6.2.7p1: Two types have compatible types if their types are the 4236/// same. See 6.7.[2,3,5] for additional rules. 4237bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS) { 4238 return !mergeTypes(LHS, RHS).isNull(); 4239} 4240 4241static bool isSameCallingConvention(CallingConv lcc, CallingConv rcc) { 4242 return (getCanonicalCallingConv(lcc) == getCanonicalCallingConv(rcc)); 4243} 4244 4245QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs) { 4246 const FunctionType *lbase = lhs->getAs<FunctionType>(); 4247 const FunctionType *rbase = rhs->getAs<FunctionType>(); 4248 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 4249 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 4250 bool allLTypes = true; 4251 bool allRTypes = true; 4252 4253 // Check return type 4254 QualType retType = mergeTypes(lbase->getResultType(), rbase->getResultType()); 4255 if (retType.isNull()) return QualType(); 4256 if (getCanonicalType(retType) != getCanonicalType(lbase->getResultType())) 4257 allLTypes = false; 4258 if (getCanonicalType(retType) != getCanonicalType(rbase->getResultType())) 4259 allRTypes = false; 4260 // FIXME: double check this 4261 bool NoReturn = lbase->getNoReturnAttr() || rbase->getNoReturnAttr(); 4262 if (NoReturn != lbase->getNoReturnAttr()) 4263 allLTypes = false; 4264 if (NoReturn != rbase->getNoReturnAttr()) 4265 allRTypes = false; 4266 CallingConv lcc = lbase->getCallConv(); 4267 CallingConv rcc = rbase->getCallConv(); 4268 // Compatible functions must have compatible calling conventions 4269 if (!isSameCallingConvention(lcc, rcc)) 4270 return QualType(); 4271 4272 if (lproto && rproto) { // two C99 style function prototypes 4273 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 4274 "C++ shouldn't be here"); 4275 unsigned lproto_nargs = lproto->getNumArgs(); 4276 unsigned rproto_nargs = rproto->getNumArgs(); 4277 4278 // Compatible functions must have the same number of arguments 4279 if (lproto_nargs != rproto_nargs) 4280 return QualType(); 4281 4282 // Variadic and non-variadic functions aren't compatible 4283 if (lproto->isVariadic() != rproto->isVariadic()) 4284 return QualType(); 4285 4286 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 4287 return QualType(); 4288 4289 // Check argument compatibility 4290 llvm::SmallVector<QualType, 10> types; 4291 for (unsigned i = 0; i < lproto_nargs; i++) { 4292 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 4293 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 4294 QualType argtype = mergeTypes(largtype, rargtype); 4295 if (argtype.isNull()) return QualType(); 4296 types.push_back(argtype); 4297 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 4298 allLTypes = false; 4299 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 4300 allRTypes = false; 4301 } 4302 if (allLTypes) return lhs; 4303 if (allRTypes) return rhs; 4304 return getFunctionType(retType, types.begin(), types.size(), 4305 lproto->isVariadic(), lproto->getTypeQuals(), 4306 NoReturn, lcc); 4307 } 4308 4309 if (lproto) allRTypes = false; 4310 if (rproto) allLTypes = false; 4311 4312 const FunctionProtoType *proto = lproto ? lproto : rproto; 4313 if (proto) { 4314 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 4315 if (proto->isVariadic()) return QualType(); 4316 // Check that the types are compatible with the types that 4317 // would result from default argument promotions (C99 6.7.5.3p15). 4318 // The only types actually affected are promotable integer 4319 // types and floats, which would be passed as a different 4320 // type depending on whether the prototype is visible. 4321 unsigned proto_nargs = proto->getNumArgs(); 4322 for (unsigned i = 0; i < proto_nargs; ++i) { 4323 QualType argTy = proto->getArgType(i); 4324 if (argTy->isPromotableIntegerType() || 4325 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 4326 return QualType(); 4327 } 4328 4329 if (allLTypes) return lhs; 4330 if (allRTypes) return rhs; 4331 return getFunctionType(retType, proto->arg_type_begin(), 4332 proto->getNumArgs(), proto->isVariadic(), 4333 proto->getTypeQuals(), NoReturn, lcc); 4334 } 4335 4336 if (allLTypes) return lhs; 4337 if (allRTypes) return rhs; 4338 return getFunctionNoProtoType(retType, NoReturn, lcc); 4339} 4340 4341QualType ASTContext::mergeTypes(QualType LHS, QualType RHS) { 4342 // C++ [expr]: If an expression initially has the type "reference to T", the 4343 // type is adjusted to "T" prior to any further analysis, the expression 4344 // designates the object or function denoted by the reference, and the 4345 // expression is an lvalue unless the reference is an rvalue reference and 4346 // the expression is a function call (possibly inside parentheses). 4347 // FIXME: C++ shouldn't be going through here! The rules are different 4348 // enough that they should be handled separately. 4349 // FIXME: Merging of lvalue and rvalue references is incorrect. C++ *really* 4350 // shouldn't be going through here! 4351 if (const ReferenceType *RT = LHS->getAs<ReferenceType>()) 4352 LHS = RT->getPointeeType(); 4353 if (const ReferenceType *RT = RHS->getAs<ReferenceType>()) 4354 RHS = RT->getPointeeType(); 4355 4356 QualType LHSCan = getCanonicalType(LHS), 4357 RHSCan = getCanonicalType(RHS); 4358 4359 // If two types are identical, they are compatible. 4360 if (LHSCan == RHSCan) 4361 return LHS; 4362 4363 // If the qualifiers are different, the types aren't compatible... mostly. 4364 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 4365 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 4366 if (LQuals != RQuals) { 4367 // If any of these qualifiers are different, we have a type 4368 // mismatch. 4369 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 4370 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 4371 return QualType(); 4372 4373 // Exactly one GC qualifier difference is allowed: __strong is 4374 // okay if the other type has no GC qualifier but is an Objective 4375 // C object pointer (i.e. implicitly strong by default). We fix 4376 // this by pretending that the unqualified type was actually 4377 // qualified __strong. 4378 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 4379 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 4380 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 4381 4382 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 4383 return QualType(); 4384 4385 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) { 4386 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong)); 4387 } 4388 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) { 4389 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS); 4390 } 4391 return QualType(); 4392 } 4393 4394 // Okay, qualifiers are equal. 4395 4396 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 4397 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 4398 4399 // We want to consider the two function types to be the same for these 4400 // comparisons, just force one to the other. 4401 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 4402 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 4403 4404 // Same as above for arrays 4405 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 4406 LHSClass = Type::ConstantArray; 4407 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 4408 RHSClass = Type::ConstantArray; 4409 4410 // Canonicalize ExtVector -> Vector. 4411 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 4412 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 4413 4414 // If the canonical type classes don't match. 4415 if (LHSClass != RHSClass) { 4416 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 4417 // a signed integer type, or an unsigned integer type. 4418 // Compatibility is based on the underlying type, not the promotion 4419 // type. 4420 if (const EnumType* ETy = LHS->getAs<EnumType>()) { 4421 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 4422 return RHS; 4423 } 4424 if (const EnumType* ETy = RHS->getAs<EnumType>()) { 4425 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 4426 return LHS; 4427 } 4428 4429 return QualType(); 4430 } 4431 4432 // The canonical type classes match. 4433 switch (LHSClass) { 4434#define TYPE(Class, Base) 4435#define ABSTRACT_TYPE(Class, Base) 4436#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 4437#define DEPENDENT_TYPE(Class, Base) case Type::Class: 4438#include "clang/AST/TypeNodes.def" 4439 assert(false && "Non-canonical and dependent types shouldn't get here"); 4440 return QualType(); 4441 4442 case Type::LValueReference: 4443 case Type::RValueReference: 4444 case Type::MemberPointer: 4445 assert(false && "C++ should never be in mergeTypes"); 4446 return QualType(); 4447 4448 case Type::IncompleteArray: 4449 case Type::VariableArray: 4450 case Type::FunctionProto: 4451 case Type::ExtVector: 4452 assert(false && "Types are eliminated above"); 4453 return QualType(); 4454 4455 case Type::Pointer: 4456 { 4457 // Merge two pointer types, while trying to preserve typedef info 4458 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType(); 4459 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType(); 4460 QualType ResultType = mergeTypes(LHSPointee, RHSPointee); 4461 if (ResultType.isNull()) return QualType(); 4462 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4463 return LHS; 4464 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4465 return RHS; 4466 return getPointerType(ResultType); 4467 } 4468 case Type::BlockPointer: 4469 { 4470 // Merge two block pointer types, while trying to preserve typedef info 4471 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType(); 4472 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType(); 4473 QualType ResultType = mergeTypes(LHSPointee, RHSPointee); 4474 if (ResultType.isNull()) return QualType(); 4475 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4476 return LHS; 4477 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4478 return RHS; 4479 return getBlockPointerType(ResultType); 4480 } 4481 case Type::ConstantArray: 4482 { 4483 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 4484 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 4485 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 4486 return QualType(); 4487 4488 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 4489 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 4490 QualType ResultType = mergeTypes(LHSElem, RHSElem); 4491 if (ResultType.isNull()) return QualType(); 4492 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4493 return LHS; 4494 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4495 return RHS; 4496 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 4497 ArrayType::ArraySizeModifier(), 0); 4498 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 4499 ArrayType::ArraySizeModifier(), 0); 4500 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 4501 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 4502 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4503 return LHS; 4504 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4505 return RHS; 4506 if (LVAT) { 4507 // FIXME: This isn't correct! But tricky to implement because 4508 // the array's size has to be the size of LHS, but the type 4509 // has to be different. 4510 return LHS; 4511 } 4512 if (RVAT) { 4513 // FIXME: This isn't correct! But tricky to implement because 4514 // the array's size has to be the size of RHS, but the type 4515 // has to be different. 4516 return RHS; 4517 } 4518 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 4519 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 4520 return getIncompleteArrayType(ResultType, 4521 ArrayType::ArraySizeModifier(), 0); 4522 } 4523 case Type::FunctionNoProto: 4524 return mergeFunctionTypes(LHS, RHS); 4525 case Type::Record: 4526 case Type::Enum: 4527 return QualType(); 4528 case Type::Builtin: 4529 // Only exactly equal builtin types are compatible, which is tested above. 4530 return QualType(); 4531 case Type::Complex: 4532 // Distinct complex types are incompatible. 4533 return QualType(); 4534 case Type::Vector: 4535 // FIXME: The merged type should be an ExtVector! 4536 if (areCompatVectorTypes(LHS->getAs<VectorType>(), RHS->getAs<VectorType>())) 4537 return LHS; 4538 return QualType(); 4539 case Type::ObjCInterface: { 4540 // Check if the interfaces are assignment compatible. 4541 // FIXME: This should be type compatibility, e.g. whether 4542 // "LHS x; RHS x;" at global scope is legal. 4543 const ObjCInterfaceType* LHSIface = LHS->getAs<ObjCInterfaceType>(); 4544 const ObjCInterfaceType* RHSIface = RHS->getAs<ObjCInterfaceType>(); 4545 if (LHSIface && RHSIface && 4546 canAssignObjCInterfaces(LHSIface, RHSIface)) 4547 return LHS; 4548 4549 return QualType(); 4550 } 4551 case Type::ObjCObjectPointer: { 4552 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(), 4553 RHS->getAs<ObjCObjectPointerType>())) 4554 return LHS; 4555 4556 return QualType(); 4557 } 4558 case Type::TemplateSpecialization: 4559 assert(false && "Dependent types have no size"); 4560 break; 4561 } 4562 4563 return QualType(); 4564} 4565 4566//===----------------------------------------------------------------------===// 4567// Integer Predicates 4568//===----------------------------------------------------------------------===// 4569 4570unsigned ASTContext::getIntWidth(QualType T) { 4571 if (T->isBooleanType()) 4572 return 1; 4573 if (EnumType *ET = dyn_cast<EnumType>(T)) 4574 T = ET->getDecl()->getIntegerType(); 4575 // For builtin types, just use the standard type sizing method 4576 return (unsigned)getTypeSize(T); 4577} 4578 4579QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 4580 assert(T->isSignedIntegerType() && "Unexpected type"); 4581 4582 // Turn <4 x signed int> -> <4 x unsigned int> 4583 if (const VectorType *VTy = T->getAs<VectorType>()) 4584 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()), 4585 VTy->getNumElements()); 4586 4587 // For enums, we return the unsigned version of the base type. 4588 if (const EnumType *ETy = T->getAs<EnumType>()) 4589 T = ETy->getDecl()->getIntegerType(); 4590 4591 const BuiltinType *BTy = T->getAs<BuiltinType>(); 4592 assert(BTy && "Unexpected signed integer type"); 4593 switch (BTy->getKind()) { 4594 case BuiltinType::Char_S: 4595 case BuiltinType::SChar: 4596 return UnsignedCharTy; 4597 case BuiltinType::Short: 4598 return UnsignedShortTy; 4599 case BuiltinType::Int: 4600 return UnsignedIntTy; 4601 case BuiltinType::Long: 4602 return UnsignedLongTy; 4603 case BuiltinType::LongLong: 4604 return UnsignedLongLongTy; 4605 case BuiltinType::Int128: 4606 return UnsignedInt128Ty; 4607 default: 4608 assert(0 && "Unexpected signed integer type"); 4609 return QualType(); 4610 } 4611} 4612 4613ExternalASTSource::~ExternalASTSource() { } 4614 4615void ExternalASTSource::PrintStats() { } 4616 4617 4618//===----------------------------------------------------------------------===// 4619// Builtin Type Computation 4620//===----------------------------------------------------------------------===// 4621 4622/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 4623/// pointer over the consumed characters. This returns the resultant type. 4624static QualType DecodeTypeFromStr(const char *&Str, ASTContext &Context, 4625 ASTContext::GetBuiltinTypeError &Error, 4626 bool AllowTypeModifiers = true) { 4627 // Modifiers. 4628 int HowLong = 0; 4629 bool Signed = false, Unsigned = false; 4630 4631 // Read the modifiers first. 4632 bool Done = false; 4633 while (!Done) { 4634 switch (*Str++) { 4635 default: Done = true; --Str; break; 4636 case 'S': 4637 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 4638 assert(!Signed && "Can't use 'S' modifier multiple times!"); 4639 Signed = true; 4640 break; 4641 case 'U': 4642 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 4643 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 4644 Unsigned = true; 4645 break; 4646 case 'L': 4647 assert(HowLong <= 2 && "Can't have LLLL modifier"); 4648 ++HowLong; 4649 break; 4650 } 4651 } 4652 4653 QualType Type; 4654 4655 // Read the base type. 4656 switch (*Str++) { 4657 default: assert(0 && "Unknown builtin type letter!"); 4658 case 'v': 4659 assert(HowLong == 0 && !Signed && !Unsigned && 4660 "Bad modifiers used with 'v'!"); 4661 Type = Context.VoidTy; 4662 break; 4663 case 'f': 4664 assert(HowLong == 0 && !Signed && !Unsigned && 4665 "Bad modifiers used with 'f'!"); 4666 Type = Context.FloatTy; 4667 break; 4668 case 'd': 4669 assert(HowLong < 2 && !Signed && !Unsigned && 4670 "Bad modifiers used with 'd'!"); 4671 if (HowLong) 4672 Type = Context.LongDoubleTy; 4673 else 4674 Type = Context.DoubleTy; 4675 break; 4676 case 's': 4677 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 4678 if (Unsigned) 4679 Type = Context.UnsignedShortTy; 4680 else 4681 Type = Context.ShortTy; 4682 break; 4683 case 'i': 4684 if (HowLong == 3) 4685 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 4686 else if (HowLong == 2) 4687 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 4688 else if (HowLong == 1) 4689 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 4690 else 4691 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 4692 break; 4693 case 'c': 4694 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 4695 if (Signed) 4696 Type = Context.SignedCharTy; 4697 else if (Unsigned) 4698 Type = Context.UnsignedCharTy; 4699 else 4700 Type = Context.CharTy; 4701 break; 4702 case 'b': // boolean 4703 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 4704 Type = Context.BoolTy; 4705 break; 4706 case 'z': // size_t. 4707 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 4708 Type = Context.getSizeType(); 4709 break; 4710 case 'F': 4711 Type = Context.getCFConstantStringType(); 4712 break; 4713 case 'a': 4714 Type = Context.getBuiltinVaListType(); 4715 assert(!Type.isNull() && "builtin va list type not initialized!"); 4716 break; 4717 case 'A': 4718 // This is a "reference" to a va_list; however, what exactly 4719 // this means depends on how va_list is defined. There are two 4720 // different kinds of va_list: ones passed by value, and ones 4721 // passed by reference. An example of a by-value va_list is 4722 // x86, where va_list is a char*. An example of by-ref va_list 4723 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 4724 // we want this argument to be a char*&; for x86-64, we want 4725 // it to be a __va_list_tag*. 4726 Type = Context.getBuiltinVaListType(); 4727 assert(!Type.isNull() && "builtin va list type not initialized!"); 4728 if (Type->isArrayType()) { 4729 Type = Context.getArrayDecayedType(Type); 4730 } else { 4731 Type = Context.getLValueReferenceType(Type); 4732 } 4733 break; 4734 case 'V': { 4735 char *End; 4736 unsigned NumElements = strtoul(Str, &End, 10); 4737 assert(End != Str && "Missing vector size"); 4738 4739 Str = End; 4740 4741 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 4742 Type = Context.getVectorType(ElementType, NumElements); 4743 break; 4744 } 4745 case 'X': { 4746 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 4747 Type = Context.getComplexType(ElementType); 4748 break; 4749 } 4750 case 'P': 4751 Type = Context.getFILEType(); 4752 if (Type.isNull()) { 4753 Error = ASTContext::GE_Missing_stdio; 4754 return QualType(); 4755 } 4756 break; 4757 case 'J': 4758 if (Signed) 4759 Type = Context.getsigjmp_bufType(); 4760 else 4761 Type = Context.getjmp_bufType(); 4762 4763 if (Type.isNull()) { 4764 Error = ASTContext::GE_Missing_setjmp; 4765 return QualType(); 4766 } 4767 break; 4768 } 4769 4770 if (!AllowTypeModifiers) 4771 return Type; 4772 4773 Done = false; 4774 while (!Done) { 4775 switch (*Str++) { 4776 default: Done = true; --Str; break; 4777 case '*': 4778 Type = Context.getPointerType(Type); 4779 break; 4780 case '&': 4781 Type = Context.getLValueReferenceType(Type); 4782 break; 4783 // FIXME: There's no way to have a built-in with an rvalue ref arg. 4784 case 'C': 4785 Type = Type.withConst(); 4786 break; 4787 } 4788 } 4789 4790 return Type; 4791} 4792 4793/// GetBuiltinType - Return the type for the specified builtin. 4794QualType ASTContext::GetBuiltinType(unsigned id, 4795 GetBuiltinTypeError &Error) { 4796 const char *TypeStr = BuiltinInfo.GetTypeString(id); 4797 4798 llvm::SmallVector<QualType, 8> ArgTypes; 4799 4800 Error = GE_None; 4801 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error); 4802 if (Error != GE_None) 4803 return QualType(); 4804 while (TypeStr[0] && TypeStr[0] != '.') { 4805 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error); 4806 if (Error != GE_None) 4807 return QualType(); 4808 4809 // Do array -> pointer decay. The builtin should use the decayed type. 4810 if (Ty->isArrayType()) 4811 Ty = getArrayDecayedType(Ty); 4812 4813 ArgTypes.push_back(Ty); 4814 } 4815 4816 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 4817 "'.' should only occur at end of builtin type list!"); 4818 4819 // handle untyped/variadic arguments "T c99Style();" or "T cppStyle(...);". 4820 if (ArgTypes.size() == 0 && TypeStr[0] == '.') 4821 return getFunctionNoProtoType(ResType); 4822 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), 4823 TypeStr[0] == '.', 0); 4824} 4825 4826QualType 4827ASTContext::UsualArithmeticConversionsType(QualType lhs, QualType rhs) { 4828 // Perform the usual unary conversions. We do this early so that 4829 // integral promotions to "int" can allow us to exit early, in the 4830 // lhs == rhs check. Also, for conversion purposes, we ignore any 4831 // qualifiers. For example, "const float" and "float" are 4832 // equivalent. 4833 if (lhs->isPromotableIntegerType()) 4834 lhs = getPromotedIntegerType(lhs); 4835 else 4836 lhs = lhs.getUnqualifiedType(); 4837 if (rhs->isPromotableIntegerType()) 4838 rhs = getPromotedIntegerType(rhs); 4839 else 4840 rhs = rhs.getUnqualifiedType(); 4841 4842 // If both types are identical, no conversion is needed. 4843 if (lhs == rhs) 4844 return lhs; 4845 4846 // If either side is a non-arithmetic type (e.g. a pointer), we are done. 4847 // The caller can deal with this (e.g. pointer + int). 4848 if (!lhs->isArithmeticType() || !rhs->isArithmeticType()) 4849 return lhs; 4850 4851 // At this point, we have two different arithmetic types. 4852 4853 // Handle complex types first (C99 6.3.1.8p1). 4854 if (lhs->isComplexType() || rhs->isComplexType()) { 4855 // if we have an integer operand, the result is the complex type. 4856 if (rhs->isIntegerType() || rhs->isComplexIntegerType()) { 4857 // convert the rhs to the lhs complex type. 4858 return lhs; 4859 } 4860 if (lhs->isIntegerType() || lhs->isComplexIntegerType()) { 4861 // convert the lhs to the rhs complex type. 4862 return rhs; 4863 } 4864 // This handles complex/complex, complex/float, or float/complex. 4865 // When both operands are complex, the shorter operand is converted to the 4866 // type of the longer, and that is the type of the result. This corresponds 4867 // to what is done when combining two real floating-point operands. 4868 // The fun begins when size promotion occur across type domains. 4869 // From H&S 6.3.4: When one operand is complex and the other is a real 4870 // floating-point type, the less precise type is converted, within it's 4871 // real or complex domain, to the precision of the other type. For example, 4872 // when combining a "long double" with a "double _Complex", the 4873 // "double _Complex" is promoted to "long double _Complex". 4874 int result = getFloatingTypeOrder(lhs, rhs); 4875 4876 if (result > 0) { // The left side is bigger, convert rhs. 4877 rhs = getFloatingTypeOfSizeWithinDomain(lhs, rhs); 4878 } else if (result < 0) { // The right side is bigger, convert lhs. 4879 lhs = getFloatingTypeOfSizeWithinDomain(rhs, lhs); 4880 } 4881 // At this point, lhs and rhs have the same rank/size. Now, make sure the 4882 // domains match. This is a requirement for our implementation, C99 4883 // does not require this promotion. 4884 if (lhs != rhs) { // Domains don't match, we have complex/float mix. 4885 if (lhs->isRealFloatingType()) { // handle "double, _Complex double". 4886 return rhs; 4887 } else { // handle "_Complex double, double". 4888 return lhs; 4889 } 4890 } 4891 return lhs; // The domain/size match exactly. 4892 } 4893 // Now handle "real" floating types (i.e. float, double, long double). 4894 if (lhs->isRealFloatingType() || rhs->isRealFloatingType()) { 4895 // if we have an integer operand, the result is the real floating type. 4896 if (rhs->isIntegerType()) { 4897 // convert rhs to the lhs floating point type. 4898 return lhs; 4899 } 4900 if (rhs->isComplexIntegerType()) { 4901 // convert rhs to the complex floating point type. 4902 return getComplexType(lhs); 4903 } 4904 if (lhs->isIntegerType()) { 4905 // convert lhs to the rhs floating point type. 4906 return rhs; 4907 } 4908 if (lhs->isComplexIntegerType()) { 4909 // convert lhs to the complex floating point type. 4910 return getComplexType(rhs); 4911 } 4912 // We have two real floating types, float/complex combos were handled above. 4913 // Convert the smaller operand to the bigger result. 4914 int result = getFloatingTypeOrder(lhs, rhs); 4915 if (result > 0) // convert the rhs 4916 return lhs; 4917 assert(result < 0 && "illegal float comparison"); 4918 return rhs; // convert the lhs 4919 } 4920 if (lhs->isComplexIntegerType() || rhs->isComplexIntegerType()) { 4921 // Handle GCC complex int extension. 4922 const ComplexType *lhsComplexInt = lhs->getAsComplexIntegerType(); 4923 const ComplexType *rhsComplexInt = rhs->getAsComplexIntegerType(); 4924 4925 if (lhsComplexInt && rhsComplexInt) { 4926 if (getIntegerTypeOrder(lhsComplexInt->getElementType(), 4927 rhsComplexInt->getElementType()) >= 0) 4928 return lhs; // convert the rhs 4929 return rhs; 4930 } else if (lhsComplexInt && rhs->isIntegerType()) { 4931 // convert the rhs to the lhs complex type. 4932 return lhs; 4933 } else if (rhsComplexInt && lhs->isIntegerType()) { 4934 // convert the lhs to the rhs complex type. 4935 return rhs; 4936 } 4937 } 4938 // Finally, we have two differing integer types. 4939 // The rules for this case are in C99 6.3.1.8 4940 int compare = getIntegerTypeOrder(lhs, rhs); 4941 bool lhsSigned = lhs->isSignedIntegerType(), 4942 rhsSigned = rhs->isSignedIntegerType(); 4943 QualType destType; 4944 if (lhsSigned == rhsSigned) { 4945 // Same signedness; use the higher-ranked type 4946 destType = compare >= 0 ? lhs : rhs; 4947 } else if (compare != (lhsSigned ? 1 : -1)) { 4948 // The unsigned type has greater than or equal rank to the 4949 // signed type, so use the unsigned type 4950 destType = lhsSigned ? rhs : lhs; 4951 } else if (getIntWidth(lhs) != getIntWidth(rhs)) { 4952 // The two types are different widths; if we are here, that 4953 // means the signed type is larger than the unsigned type, so 4954 // use the signed type. 4955 destType = lhsSigned ? lhs : rhs; 4956 } else { 4957 // The signed type is higher-ranked than the unsigned type, 4958 // but isn't actually any bigger (like unsigned int and long 4959 // on most 32-bit systems). Use the unsigned type corresponding 4960 // to the signed type. 4961 destType = getCorrespondingUnsignedType(lhsSigned ? lhs : rhs); 4962 } 4963 return destType; 4964} 4965