ASTContext.cpp revision f53df2398e07d13be9962b95aebc19b31706fa33
12a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)//===--- ASTContext.cpp - Context to hold long-lived AST nodes ------------===// 22a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// 32a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// The LLVM Compiler Infrastructure 42a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// 52a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// This file is distributed under the University of Illinois Open Source 62a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// License. See LICENSE.TXT for details. 72a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// 82a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)//===----------------------------------------------------------------------===// 92a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// 102a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// This file implements the ASTContext interface. 112a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// 122a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)//===----------------------------------------------------------------------===// 132a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 142a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "clang/AST/ASTContext.h" 152a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "clang/AST/DeclCXX.h" 162a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "clang/AST/DeclObjC.h" 172a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "clang/AST/DeclTemplate.h" 182a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "clang/AST/TypeLoc.h" 192a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "clang/AST/Expr.h" 202a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "clang/AST/ExternalASTSource.h" 212a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "clang/AST/RecordLayout.h" 222a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "clang/Basic/Builtins.h" 232a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "clang/Basic/SourceManager.h" 242a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "clang/Basic/TargetInfo.h" 252a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "llvm/ADT/SmallString.h" 262a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "llvm/ADT/StringExtras.h" 272a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "llvm/Support/MathExtras.h" 282a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "llvm/Support/raw_ostream.h" 292a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "RecordLayoutBuilder.h" 302a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 312a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)using namespace clang; 322a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 332a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)enum FloatingRank { 342a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) FloatRank, DoubleRank, LongDoubleRank 352a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)}; 362a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 372a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)ASTContext::ASTContext(const LangOptions& LOpts, SourceManager &SM, 382a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const TargetInfo &t, 392a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) IdentifierTable &idents, SelectorTable &sels, 402a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Builtin::Context &builtins, 412a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) bool FreeMem, unsigned size_reserve) : 422a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) GlobalNestedNameSpecifier(0), CFConstantStringTypeDecl(0), 432a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) ObjCFastEnumerationStateTypeDecl(0), FILEDecl(0), jmp_bufDecl(0), 442a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) sigjmp_bufDecl(0), BlockDescriptorType(0), BlockDescriptorExtendedType(0), 452a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) SourceMgr(SM), LangOpts(LOpts), 462a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) LoadedExternalComments(false), FreeMemory(FreeMem), Target(t), 472a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Idents(idents), Selectors(sels), 482a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) BuiltinInfo(builtins), ExternalSource(0), PrintingPolicy(LOpts) { 492a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) ObjCIdRedefinitionType = QualType(); 502a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) ObjCClassRedefinitionType = QualType(); 512a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) ObjCSelRedefinitionType = QualType(); 522a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (size_reserve > 0) Types.reserve(size_reserve); 532a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) TUDecl = TranslationUnitDecl::Create(*this); 542a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) InitBuiltinTypes(); 552a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 562a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 572a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)ASTContext::~ASTContext() { 582a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Deallocate all the types. 592a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) while (!Types.empty()) { 602a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Types.back()->Destroy(*this); 612a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Types.pop_back(); 622a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 632a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 642a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) { 652a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) llvm::FoldingSet<ExtQuals>::iterator 662a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) I = ExtQualNodes.begin(), E = ExtQualNodes.end(); 672a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) while (I != E) 682a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Deallocate(&*I++); 692a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 702a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 712a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) { 722a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*>::iterator 732a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) I = ASTRecordLayouts.begin(), E = ASTRecordLayouts.end(); 742a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) while (I != E) { 752a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second); 762a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) delete R; 772a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 782a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 792a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 802a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) { 812a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) llvm::DenseMap<const ObjCContainerDecl*, const ASTRecordLayout*>::iterator 822a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) I = ObjCLayouts.begin(), E = ObjCLayouts.end(); 832a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) while (I != E) { 842a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second); 852a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) delete R; 862a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 872a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 882a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 892a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Destroy nested-name-specifiers. 902a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) for (llvm::FoldingSet<NestedNameSpecifier>::iterator 912a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) NNS = NestedNameSpecifiers.begin(), 922a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) NNSEnd = NestedNameSpecifiers.end(); 932a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) NNS != NNSEnd; 942a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) /* Increment in loop */) 952a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) (*NNS++).Destroy(*this); 962a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 972a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (GlobalNestedNameSpecifier) 982a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) GlobalNestedNameSpecifier->Destroy(*this); 992a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1002a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) TUDecl->Destroy(*this); 1012a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 1022a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1032a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void 1042a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)ASTContext::setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source) { 1052a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) ExternalSource.reset(Source.take()); 1062a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 1072a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1082a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void ASTContext::PrintStats() const { 1092a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) fprintf(stderr, "*** AST Context Stats:\n"); 1102a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) fprintf(stderr, " %d types total.\n", (int)Types.size()); 1112a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1122a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) unsigned counts[] = { 1132a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#define TYPE(Name, Parent) 0, 1142a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#define ABSTRACT_TYPE(Name, Parent) 1152a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "clang/AST/TypeNodes.def" 1162a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 0 // Extra 1172a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) }; 1182a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1192a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) for (unsigned i = 0, e = Types.size(); i != e; ++i) { 1202a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Type *T = Types[i]; 1212a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) counts[(unsigned)T->getTypeClass()]++; 1222a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 1232a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1242a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) unsigned Idx = 0; 1252a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) unsigned TotalBytes = 0; 1262a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#define TYPE(Name, Parent) \ 1272a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (counts[Idx]) \ 1282a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) fprintf(stderr, " %d %s types\n", (int)counts[Idx], #Name); \ 1292a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) TotalBytes += counts[Idx] * sizeof(Name##Type); \ 1302a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) ++Idx; 1312a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#define ABSTRACT_TYPE(Name, Parent) 1322a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "clang/AST/TypeNodes.def" 1332a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1342a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) fprintf(stderr, "Total bytes = %d\n", int(TotalBytes)); 1352a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1362a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (ExternalSource.get()) { 1372a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) fprintf(stderr, "\n"); 1382a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) ExternalSource->PrintStats(); 1392a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 1402a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 1412a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1422a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1432a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void ASTContext::InitBuiltinType(CanQualType &R, BuiltinType::Kind K) { 1442a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) BuiltinType *Ty = new (*this, TypeAlignment) BuiltinType(K); 1452a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) R = CanQualType::CreateUnsafe(QualType(Ty, 0)); 1462a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Types.push_back(Ty); 1472a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 1482a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1492a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void ASTContext::InitBuiltinTypes() { 1502a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) assert(VoidTy.isNull() && "Context reinitialized?"); 1512a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1522a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // C99 6.2.5p19. 1532a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) InitBuiltinType(VoidTy, BuiltinType::Void); 1542a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1552a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // C99 6.2.5p2. 1562a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) InitBuiltinType(BoolTy, BuiltinType::Bool); 1572a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // C99 6.2.5p3. 1582a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (LangOpts.CharIsSigned) 1592a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) InitBuiltinType(CharTy, BuiltinType::Char_S); 1602a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) else 1612a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) InitBuiltinType(CharTy, BuiltinType::Char_U); 1622a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // C99 6.2.5p4. 1632a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) InitBuiltinType(SignedCharTy, BuiltinType::SChar); 1642a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) InitBuiltinType(ShortTy, BuiltinType::Short); 1652a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) InitBuiltinType(IntTy, BuiltinType::Int); 1662a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) InitBuiltinType(LongTy, BuiltinType::Long); 1672a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) InitBuiltinType(LongLongTy, BuiltinType::LongLong); 1682a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1692a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // C99 6.2.5p6. 1702a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) InitBuiltinType(UnsignedCharTy, BuiltinType::UChar); 1712a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) InitBuiltinType(UnsignedShortTy, BuiltinType::UShort); 1722a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) InitBuiltinType(UnsignedIntTy, BuiltinType::UInt); 1732a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) InitBuiltinType(UnsignedLongTy, BuiltinType::ULong); 1742a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) InitBuiltinType(UnsignedLongLongTy, BuiltinType::ULongLong); 1752a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1762a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // C99 6.2.5p10. 1772a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) InitBuiltinType(FloatTy, BuiltinType::Float); 1782a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) InitBuiltinType(DoubleTy, BuiltinType::Double); 1792a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) InitBuiltinType(LongDoubleTy, BuiltinType::LongDouble); 1802a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1812a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // GNU extension, 128-bit integers. 1822a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) InitBuiltinType(Int128Ty, BuiltinType::Int128); 1832a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) InitBuiltinType(UnsignedInt128Ty, BuiltinType::UInt128); 1842a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1852a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (LangOpts.CPlusPlus) // C++ 3.9.1p5 1862a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) InitBuiltinType(WCharTy, BuiltinType::WChar); 1872a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) else // C99 1882a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) WCharTy = getFromTargetType(Target.getWCharType()); 1892a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1902a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 1912a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) InitBuiltinType(Char16Ty, BuiltinType::Char16); 1922a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) else // C99 1932a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Char16Ty = getFromTargetType(Target.getChar16Type()); 1942a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1952a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 1962a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) InitBuiltinType(Char32Ty, BuiltinType::Char32); 1972a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) else // C99 1982a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Char32Ty = getFromTargetType(Target.getChar32Type()); 1992a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 2002a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Placeholder type for functions. 2012a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) InitBuiltinType(OverloadTy, BuiltinType::Overload); 2022a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 2032a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Placeholder type for type-dependent expressions whose type is 2042a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // completely unknown. No code should ever check a type against 2052a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // DependentTy and users should never see it; however, it is here to 2062a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // help diagnose failures to properly check for type-dependent 2072a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // expressions. 2082a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) InitBuiltinType(DependentTy, BuiltinType::Dependent); 2092a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 2102a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Placeholder type for C++0x auto declarations whose real type has 2112a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // not yet been deduced. 2122a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) InitBuiltinType(UndeducedAutoTy, BuiltinType::UndeducedAuto); 2132a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 2142a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // C99 6.2.5p11. 2152a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) FloatComplexTy = getComplexType(FloatTy); 2162a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DoubleComplexTy = getComplexType(DoubleTy); 2172a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) LongDoubleComplexTy = getComplexType(LongDoubleTy); 2182a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 2192a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) BuiltinVaListType = QualType(); 2202a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 2212a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // "Builtin" typedefs set by Sema::ActOnTranslationUnitScope(). 2222a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) ObjCIdTypedefType = QualType(); 2232a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) ObjCClassTypedefType = QualType(); 2242a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) ObjCSelTypedefType = QualType(); 2252a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 2262a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Builtin types for 'id', 'Class', and 'SEL'. 2272a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) InitBuiltinType(ObjCBuiltinIdTy, BuiltinType::ObjCId); 2282a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) InitBuiltinType(ObjCBuiltinClassTy, BuiltinType::ObjCClass); 2292a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) InitBuiltinType(ObjCBuiltinSelTy, BuiltinType::ObjCSel); 2302a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 2312a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) ObjCConstantStringType = QualType(); 2322a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 2332a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // void * type 2342a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) VoidPtrTy = getPointerType(VoidTy); 2352a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 2362a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // nullptr type (C++0x 2.14.7) 2372a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) InitBuiltinType(NullPtrTy, BuiltinType::NullPtr); 2382a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 2392a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 2402a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)MemberSpecializationInfo * 2412a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)ASTContext::getInstantiatedFromStaticDataMember(const VarDecl *Var) { 2422a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) assert(Var->isStaticDataMember() && "Not a static data member"); 2432a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *>::iterator Pos 2442a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) = InstantiatedFromStaticDataMember.find(Var); 2452a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (Pos == InstantiatedFromStaticDataMember.end()) 2462a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return 0; 2472a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 2482a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return Pos->second; 2492a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 2502a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 2512a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void 2522a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)ASTContext::setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 2532a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) TemplateSpecializationKind TSK) { 2542a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) assert(Inst->isStaticDataMember() && "Not a static data member"); 2552a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) assert(Tmpl->isStaticDataMember() && "Not a static data member"); 2562a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) assert(!InstantiatedFromStaticDataMember[Inst] && 2572a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) "Already noted what static data member was instantiated from"); 2582a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) InstantiatedFromStaticDataMember[Inst] 2592a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) = new (*this) MemberSpecializationInfo(Tmpl, TSK); 2602a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 2612a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 2622a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)NamedDecl * 2632a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)ASTContext::getInstantiatedFromUsingDecl(UsingDecl *UUD) { 2642a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) llvm::DenseMap<UsingDecl *, NamedDecl *>::const_iterator Pos 2652a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) = InstantiatedFromUsingDecl.find(UUD); 2662a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (Pos == InstantiatedFromUsingDecl.end()) 2672a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return 0; 2682a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 2692a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return Pos->second; 2702a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 2712a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 2722a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void 2732a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)ASTContext::setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern) { 2742a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) assert((isa<UsingDecl>(Pattern) || 2752a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) isa<UnresolvedUsingValueDecl>(Pattern) || 2762a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) isa<UnresolvedUsingTypenameDecl>(Pattern)) && 2772a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) "pattern decl is not a using decl"); 2782a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) assert(!InstantiatedFromUsingDecl[Inst] && "pattern already exists"); 2792a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) InstantiatedFromUsingDecl[Inst] = Pattern; 2802a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 2812a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 2822a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)UsingShadowDecl * 2832a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)ASTContext::getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst) { 2842a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*>::const_iterator Pos 2852a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) = InstantiatedFromUsingShadowDecl.find(Inst); 2862a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (Pos == InstantiatedFromUsingShadowDecl.end()) 2872a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return 0; 2882a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 2892a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return Pos->second; 2902a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 2912a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 2922a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void 2932a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)ASTContext::setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 2942a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) UsingShadowDecl *Pattern) { 2952a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) assert(!InstantiatedFromUsingShadowDecl[Inst] && "pattern already exists"); 2962a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) InstantiatedFromUsingShadowDecl[Inst] = Pattern; 2972a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 2982a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 2992a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)FieldDecl *ASTContext::getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field) { 3002a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) llvm::DenseMap<FieldDecl *, FieldDecl *>::iterator Pos 3012a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) = InstantiatedFromUnnamedFieldDecl.find(Field); 3022a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (Pos == InstantiatedFromUnnamedFieldDecl.end()) 3032a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return 0; 3042a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3052a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return Pos->second; 3062a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 3072a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3082a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void ASTContext::setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, 3092a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) FieldDecl *Tmpl) { 3102a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) assert(!Inst->getDeclName() && "Instantiated field decl is not unnamed"); 3112a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) assert(!Tmpl->getDeclName() && "Template field decl is not unnamed"); 3122a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) assert(!InstantiatedFromUnnamedFieldDecl[Inst] && 3132a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) "Already noted what unnamed field was instantiated from"); 3142a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3152a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) InstantiatedFromUnnamedFieldDecl[Inst] = Tmpl; 3162a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 3172a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3182a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)namespace { 3192a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) class BeforeInTranslationUnit 3202a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) : std::binary_function<SourceRange, SourceRange, bool> { 3212a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) SourceManager *SourceMgr; 3222a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3232a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) public: 3242a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) explicit BeforeInTranslationUnit(SourceManager *SM) : SourceMgr(SM) { } 3252a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3262a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) bool operator()(SourceRange X, SourceRange Y) { 3272a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return SourceMgr->isBeforeInTranslationUnit(X.getBegin(), Y.getBegin()); 3282a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 3292a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) }; 3302a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 3312a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3322a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)/// \brief Determine whether the given comment is a Doxygen-style comment. 3332a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)/// 3342a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)/// \param Start the start of the comment text. 3352a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)/// 3362a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)/// \param End the end of the comment text. 3372a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)/// 3382a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)/// \param Member whether we want to check whether this is a member comment 3392a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)/// (which requires a < after the Doxygen-comment delimiter). Otherwise, 3402a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)/// we only return true when we find a non-member comment. 3412a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)static bool 3422a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)isDoxygenComment(SourceManager &SourceMgr, SourceRange Comment, 3432a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) bool Member = false) { 3442a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const char *BufferStart 3452a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) = SourceMgr.getBufferData(SourceMgr.getFileID(Comment.getBegin())).first; 3462a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const char *Start = BufferStart + SourceMgr.getFileOffset(Comment.getBegin()); 3472a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const char* End = BufferStart + SourceMgr.getFileOffset(Comment.getEnd()); 3482a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3492a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (End - Start < 4) 3502a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return false; 3512a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3522a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) assert(Start[0] == '/' && "Not a comment?"); 3532a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (Start[1] == '*' && !(Start[2] == '!' || Start[2] == '*')) 3542a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return false; 3552a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (Start[1] == '/' && !(Start[2] == '!' || Start[2] == '/')) 3562a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return false; 3572a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3582a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return (Start[3] == '<') == Member; 3592a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 3602a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3612a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)/// \brief Retrieve the comment associated with the given declaration, if 3622a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)/// it has one. 3632a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)const char *ASTContext::getCommentForDecl(const Decl *D) { 3642a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (!D) 3652a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return 0; 3662a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3672a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Check whether we have cached a comment string for this declaration 3682a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // already. 3692a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) llvm::DenseMap<const Decl *, std::string>::iterator Pos 3702a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) = DeclComments.find(D); 3712a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (Pos != DeclComments.end()) 3722a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return Pos->second.c_str(); 3732a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3742a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // If we have an external AST source and have not yet loaded comments from 3752a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // that source, do so now. 3762a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (ExternalSource && !LoadedExternalComments) { 3772a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) std::vector<SourceRange> LoadedComments; 3782a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) ExternalSource->ReadComments(LoadedComments); 3792a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3802a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (!LoadedComments.empty()) 3812a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Comments.insert(Comments.begin(), LoadedComments.begin(), 3822a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) LoadedComments.end()); 3832a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3842a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) LoadedExternalComments = true; 3852a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 3862a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3872a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // If there are no comments anywhere, we won't find anything. 3882a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (Comments.empty()) 3892a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return 0; 3902a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3912a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // If the declaration doesn't map directly to a location in a file, we 3922a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // can't find the comment. 3932a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) SourceLocation DeclStartLoc = D->getLocStart(); 3942a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (DeclStartLoc.isInvalid() || !DeclStartLoc.isFileID()) 3952a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return 0; 3962a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3972a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Find the comment that occurs just before this declaration. 3982a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) std::vector<SourceRange>::iterator LastComment 3992a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) = std::lower_bound(Comments.begin(), Comments.end(), 4002a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) SourceRange(DeclStartLoc), 4012a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) BeforeInTranslationUnit(&SourceMgr)); 4022a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 4032a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Decompose the location for the start of the declaration and find the 4042a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // beginning of the file buffer. 4052a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) std::pair<FileID, unsigned> DeclStartDecomp 4062a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) = SourceMgr.getDecomposedLoc(DeclStartLoc); 4072a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const char *FileBufferStart 4082a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) = SourceMgr.getBufferData(DeclStartDecomp.first).first; 4092a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 4102a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // First check whether we have a comment for a member. 4112a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (LastComment != Comments.end() && 4122a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) !isa<TagDecl>(D) && !isa<NamespaceDecl>(D) && 4132a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) isDoxygenComment(SourceMgr, *LastComment, true)) { 4142a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) std::pair<FileID, unsigned> LastCommentEndDecomp 4152a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) = SourceMgr.getDecomposedLoc(LastComment->getEnd()); 4162a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (DeclStartDecomp.first == LastCommentEndDecomp.first && 4172a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) SourceMgr.getLineNumber(DeclStartDecomp.first, DeclStartDecomp.second) 4182a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) == SourceMgr.getLineNumber(LastCommentEndDecomp.first, 4192a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) LastCommentEndDecomp.second)) { 4202a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // The Doxygen member comment comes after the declaration starts and 4212a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // is on the same line and in the same file as the declaration. This 4222a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // is the comment we want. 4232a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) std::string &Result = DeclComments[D]; 4242a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Result.append(FileBufferStart + 4252a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) SourceMgr.getFileOffset(LastComment->getBegin()), 4262a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) FileBufferStart + LastCommentEndDecomp.second + 1); 4272a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return Result.c_str(); 4282a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 4292a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 4302a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 4312a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (LastComment == Comments.begin()) 4322a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return 0; 4332a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) --LastComment; 4342a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 4352a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Decompose the end of the comment. 4362a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) std::pair<FileID, unsigned> LastCommentEndDecomp 4372a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) = SourceMgr.getDecomposedLoc(LastComment->getEnd()); 4382a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 4392a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // If the comment and the declaration aren't in the same file, then they 4402a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // aren't related. 4412a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (DeclStartDecomp.first != LastCommentEndDecomp.first) 4422a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return 0; 4432a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 4442a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Check that we actually have a Doxygen comment. 4452a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (!isDoxygenComment(SourceMgr, *LastComment)) 4462a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return 0; 4472a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 4482a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Compute the starting line for the declaration and for the end of the 4492a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // comment (this is expensive). 4502a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) unsigned DeclStartLine 4512a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) = SourceMgr.getLineNumber(DeclStartDecomp.first, DeclStartDecomp.second); 4522a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) unsigned CommentEndLine 4532a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) = SourceMgr.getLineNumber(LastCommentEndDecomp.first, 4542a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) LastCommentEndDecomp.second); 4552a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 4562a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // If the comment does not end on the line prior to the declaration, then 4572a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // the comment is not associated with the declaration at all. 4582a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (CommentEndLine + 1 != DeclStartLine) 4592a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return 0; 4602a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 4612a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // We have a comment, but there may be more comments on the previous lines. 4622a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Keep looking so long as the comments are still Doxygen comments and are 4632a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // still adjacent. 4642a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) unsigned ExpectedLine 4652a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) = SourceMgr.getSpellingLineNumber(LastComment->getBegin()) - 1; 4662a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) std::vector<SourceRange>::iterator FirstComment = LastComment; 4672a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) while (FirstComment != Comments.begin()) { 4682a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Look at the previous comment 4692a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) --FirstComment; 4702a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) std::pair<FileID, unsigned> Decomp 4712a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) = SourceMgr.getDecomposedLoc(FirstComment->getEnd()); 4722a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 4732a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // If this previous comment is in a different file, we're done. 4742a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (Decomp.first != DeclStartDecomp.first) { 4752a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) ++FirstComment; 4762a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) break; 4772a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 4782a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 4792a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // If this comment is not a Doxygen comment, we're done. 4802a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (!isDoxygenComment(SourceMgr, *FirstComment)) { 4812a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) ++FirstComment; 4822a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) break; 4832a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 4842a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 4852a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // If the line number is not what we expected, we're done. 4862a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) unsigned Line = SourceMgr.getLineNumber(Decomp.first, Decomp.second); 4872a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (Line != ExpectedLine) { 4882a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) ++FirstComment; 4892a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) break; 4902a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 4912a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 4922a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Set the next expected line number. 4932a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) ExpectedLine 4942a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) = SourceMgr.getSpellingLineNumber(FirstComment->getBegin()) - 1; 4952a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 4962a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 4972a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // The iterator range [FirstComment, LastComment] contains all of the 4982a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // BCPL comments that, together, are associated with this declaration. 4992a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Form a single comment block string for this declaration that concatenates 5002a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // all of these comments. 5012a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) std::string &Result = DeclComments[D]; 5022a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) while (FirstComment != LastComment) { 5032a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) std::pair<FileID, unsigned> DecompStart 5042a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) = SourceMgr.getDecomposedLoc(FirstComment->getBegin()); 5052a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) std::pair<FileID, unsigned> DecompEnd 5062a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) = SourceMgr.getDecomposedLoc(FirstComment->getEnd()); 5072a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Result.append(FileBufferStart + DecompStart.second, 5082a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) FileBufferStart + DecompEnd.second + 1); 5092a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) ++FirstComment; 5102a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 5112a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 5122a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Append the last comment line. 5132a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Result.append(FileBufferStart + 5142a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) SourceMgr.getFileOffset(LastComment->getBegin()), 5152a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) FileBufferStart + LastCommentEndDecomp.second + 1); 5162a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return Result.c_str(); 5172a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 5182a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 5192a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)//===----------------------------------------------------------------------===// 5202a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// Type Sizing and Analysis 5212a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)//===----------------------------------------------------------------------===// 5222a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 5232a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 5242a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)/// scalar floating point type. 5252a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 5262a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const BuiltinType *BT = T->getAs<BuiltinType>(); 5272a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) assert(BT && "Not a floating point type!"); 5282a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) switch (BT->getKind()) { 5292a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) default: assert(0 && "Not a floating point type!"); 5302a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) case BuiltinType::Float: return Target.getFloatFormat(); 5312a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) case BuiltinType::Double: return Target.getDoubleFormat(); 5322a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) case BuiltinType::LongDouble: return Target.getLongDoubleFormat(); 5332a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 5342a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 5352a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 5362a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)/// getDeclAlignInBytes - Return a conservative estimate of the alignment of the 5372a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)/// specified decl. Note that bitfields do not have a valid alignment, so 5382a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)/// this method will assert on them. 5392a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)/// If @p RefAsPointee, references are treated like their underlying type 5402a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)/// (for alignof), else they're treated like pointers (for CodeGen). 5412a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)unsigned ASTContext::getDeclAlignInBytes(const Decl *D, bool RefAsPointee) { 5422a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) unsigned Align = Target.getCharWidth(); 5432a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 5442a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (const AlignedAttr* AA = D->getAttr<AlignedAttr>()) 5452a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Align = std::max(Align, AA->getMaxAlignment()); 5462a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 5472a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 5482a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) QualType T = VD->getType(); 5492a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (const ReferenceType* RT = T->getAs<ReferenceType>()) { 5502a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (RefAsPointee) 5512a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) T = RT->getPointeeType(); 5522a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) else 5532a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) T = getPointerType(RT->getPointeeType()); 5542a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 5552a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (!T->isIncompleteType() && !T->isFunctionType()) { 5562a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Incomplete or function types default to 1. 5572a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) while (isa<VariableArrayType>(T) || isa<IncompleteArrayType>(T)) 5582a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) T = cast<ArrayType>(T)->getElementType(); 5592a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 5602a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 5612a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 5622a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 5632a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 5642a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return Align / Target.getCharWidth(); 5652a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 5662a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 5672a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)/// getTypeSize - Return the size of the specified type, in bits. This method 5682a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)/// does not work on incomplete types. 5692a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)/// 5702a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)/// FIXME: Pointers into different addr spaces could have different sizes and 5712a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)/// alignment requirements: getPointerInfo should take an AddrSpace, this 5722a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)/// should take a QualType, &c. 5732a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)std::pair<uint64_t, unsigned> 5742a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)ASTContext::getTypeInfo(const Type *T) { 5752a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) uint64_t Width=0; 5762a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) unsigned Align=8; 5772a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) switch (T->getTypeClass()) { 5782a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#define TYPE(Class, Base) 5792a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#define ABSTRACT_TYPE(Class, Base) 5802a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#define NON_CANONICAL_TYPE(Class, Base) 5812a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#define DEPENDENT_TYPE(Class, Base) case Type::Class: 5822a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "clang/AST/TypeNodes.def" 5832a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) assert(false && "Should not see dependent types"); 5842a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) break; 5852a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 5862a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) case Type::FunctionNoProto: 5872a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) case Type::FunctionProto: 5882a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // GCC extension: alignof(function) = 32 bits 5892a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Width = 0; 5902a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Align = 32; 5912a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) break; 5922a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 5932a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) case Type::IncompleteArray: 5942a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) case Type::VariableArray: 5952a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Width = 0; 5962a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Align = getTypeAlign(cast<ArrayType>(T)->getElementType()); 5972a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) break; 5982a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 5992a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) case Type::ConstantArray: { 6002a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 6012a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 6022a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 6032a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Width = EltInfo.first*CAT->getSize().getZExtValue(); 6042a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Align = EltInfo.second; 6052a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) break; 6062a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 6072a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) case Type::ExtVector: 6082a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) case Type::Vector: { 6092a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const VectorType *VT = cast<VectorType>(T); 6102a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(VT->getElementType()); 6112a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Width = EltInfo.first*VT->getNumElements(); 6122a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Align = Width; 6132a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // If the alignment is not a power of 2, round up to the next power of 2. 6142a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // This happens for non-power-of-2 length vectors. 6152a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (VT->getNumElements() & (VT->getNumElements()-1)) { 6162a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Align = llvm::NextPowerOf2(Align); 6172a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Width = llvm::RoundUpToAlignment(Width, Align); 6182a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 6192a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) break; 6202a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 6212a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 6222a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) case Type::Builtin: 6232a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) switch (cast<BuiltinType>(T)->getKind()) { 6242a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) default: assert(0 && "Unknown builtin type!"); 6252a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) case BuiltinType::Void: 6262a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // GCC extension: alignof(void) = 8 bits. 6272a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Width = 0; 6282a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Align = 8; 6292a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) break; 6302a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 6312a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) case BuiltinType::Bool: 6322a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Width = Target.getBoolWidth(); 6332a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Align = Target.getBoolAlign(); 6342a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) break; 6352a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) case BuiltinType::Char_S: 6362a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) case BuiltinType::Char_U: 6372a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) case BuiltinType::UChar: 6382a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) case BuiltinType::SChar: 6392a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Width = Target.getCharWidth(); 6402a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Align = Target.getCharAlign(); 6412a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) break; 6422a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) case BuiltinType::WChar: 643 Width = Target.getWCharWidth(); 644 Align = Target.getWCharAlign(); 645 break; 646 case BuiltinType::Char16: 647 Width = Target.getChar16Width(); 648 Align = Target.getChar16Align(); 649 break; 650 case BuiltinType::Char32: 651 Width = Target.getChar32Width(); 652 Align = Target.getChar32Align(); 653 break; 654 case BuiltinType::UShort: 655 case BuiltinType::Short: 656 Width = Target.getShortWidth(); 657 Align = Target.getShortAlign(); 658 break; 659 case BuiltinType::UInt: 660 case BuiltinType::Int: 661 Width = Target.getIntWidth(); 662 Align = Target.getIntAlign(); 663 break; 664 case BuiltinType::ULong: 665 case BuiltinType::Long: 666 Width = Target.getLongWidth(); 667 Align = Target.getLongAlign(); 668 break; 669 case BuiltinType::ULongLong: 670 case BuiltinType::LongLong: 671 Width = Target.getLongLongWidth(); 672 Align = Target.getLongLongAlign(); 673 break; 674 case BuiltinType::Int128: 675 case BuiltinType::UInt128: 676 Width = 128; 677 Align = 128; // int128_t is 128-bit aligned on all targets. 678 break; 679 case BuiltinType::Float: 680 Width = Target.getFloatWidth(); 681 Align = Target.getFloatAlign(); 682 break; 683 case BuiltinType::Double: 684 Width = Target.getDoubleWidth(); 685 Align = Target.getDoubleAlign(); 686 break; 687 case BuiltinType::LongDouble: 688 Width = Target.getLongDoubleWidth(); 689 Align = Target.getLongDoubleAlign(); 690 break; 691 case BuiltinType::NullPtr: 692 Width = Target.getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t) 693 Align = Target.getPointerAlign(0); // == sizeof(void*) 694 break; 695 } 696 break; 697 case Type::FixedWidthInt: 698 // FIXME: This isn't precisely correct; the width/alignment should depend 699 // on the available types for the target 700 Width = cast<FixedWidthIntType>(T)->getWidth(); 701 Width = std::max(llvm::NextPowerOf2(Width - 1), (uint64_t)8); 702 Align = Width; 703 break; 704 case Type::ObjCObjectPointer: 705 Width = Target.getPointerWidth(0); 706 Align = Target.getPointerAlign(0); 707 break; 708 case Type::BlockPointer: { 709 unsigned AS = cast<BlockPointerType>(T)->getPointeeType().getAddressSpace(); 710 Width = Target.getPointerWidth(AS); 711 Align = Target.getPointerAlign(AS); 712 break; 713 } 714 case Type::LValueReference: 715 case Type::RValueReference: { 716 // alignof and sizeof should never enter this code path here, so we go 717 // the pointer route. 718 unsigned AS = cast<ReferenceType>(T)->getPointeeType().getAddressSpace(); 719 Width = Target.getPointerWidth(AS); 720 Align = Target.getPointerAlign(AS); 721 break; 722 } 723 case Type::Pointer: { 724 unsigned AS = cast<PointerType>(T)->getPointeeType().getAddressSpace(); 725 Width = Target.getPointerWidth(AS); 726 Align = Target.getPointerAlign(AS); 727 break; 728 } 729 case Type::MemberPointer: { 730 QualType Pointee = cast<MemberPointerType>(T)->getPointeeType(); 731 std::pair<uint64_t, unsigned> PtrDiffInfo = 732 getTypeInfo(getPointerDiffType()); 733 Width = PtrDiffInfo.first; 734 if (Pointee->isFunctionType()) 735 Width *= 2; 736 Align = PtrDiffInfo.second; 737 break; 738 } 739 case Type::Complex: { 740 // Complex types have the same alignment as their elements, but twice the 741 // size. 742 std::pair<uint64_t, unsigned> EltInfo = 743 getTypeInfo(cast<ComplexType>(T)->getElementType()); 744 Width = EltInfo.first*2; 745 Align = EltInfo.second; 746 break; 747 } 748 case Type::ObjCInterface: { 749 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 750 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 751 Width = Layout.getSize(); 752 Align = Layout.getAlignment(); 753 break; 754 } 755 case Type::Record: 756 case Type::Enum: { 757 const TagType *TT = cast<TagType>(T); 758 759 if (TT->getDecl()->isInvalidDecl()) { 760 Width = 1; 761 Align = 1; 762 break; 763 } 764 765 if (const EnumType *ET = dyn_cast<EnumType>(TT)) 766 return getTypeInfo(ET->getDecl()->getIntegerType()); 767 768 const RecordType *RT = cast<RecordType>(TT); 769 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 770 Width = Layout.getSize(); 771 Align = Layout.getAlignment(); 772 break; 773 } 774 775 case Type::SubstTemplateTypeParm: 776 return getTypeInfo(cast<SubstTemplateTypeParmType>(T)-> 777 getReplacementType().getTypePtr()); 778 779 case Type::Elaborated: 780 return getTypeInfo(cast<ElaboratedType>(T)->getUnderlyingType() 781 .getTypePtr()); 782 783 case Type::Typedef: { 784 const TypedefDecl *Typedef = cast<TypedefType>(T)->getDecl(); 785 if (const AlignedAttr *Aligned = Typedef->getAttr<AlignedAttr>()) { 786 Align = std::max(Aligned->getMaxAlignment(), 787 getTypeAlign(Typedef->getUnderlyingType().getTypePtr())); 788 Width = getTypeSize(Typedef->getUnderlyingType().getTypePtr()); 789 } else 790 return getTypeInfo(Typedef->getUnderlyingType().getTypePtr()); 791 break; 792 } 793 794 case Type::TypeOfExpr: 795 return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType() 796 .getTypePtr()); 797 798 case Type::TypeOf: 799 return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr()); 800 801 case Type::Decltype: 802 return getTypeInfo(cast<DecltypeType>(T)->getUnderlyingExpr()->getType() 803 .getTypePtr()); 804 805 case Type::QualifiedName: 806 return getTypeInfo(cast<QualifiedNameType>(T)->getNamedType().getTypePtr()); 807 808 case Type::TemplateSpecialization: 809 assert(getCanonicalType(T) != T && 810 "Cannot request the size of a dependent type"); 811 // FIXME: this is likely to be wrong once we support template 812 // aliases, since a template alias could refer to a typedef that 813 // has an __aligned__ attribute on it. 814 return getTypeInfo(getCanonicalType(T)); 815 } 816 817 assert(Align && (Align & (Align-1)) == 0 && "Alignment must be power of 2"); 818 return std::make_pair(Width, Align); 819} 820 821/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 822/// type for the current target in bits. This can be different than the ABI 823/// alignment in cases where it is beneficial for performance to overalign 824/// a data type. 825unsigned ASTContext::getPreferredTypeAlign(const Type *T) { 826 unsigned ABIAlign = getTypeAlign(T); 827 828 // Double and long long should be naturally aligned if possible. 829 if (const ComplexType* CT = T->getAs<ComplexType>()) 830 T = CT->getElementType().getTypePtr(); 831 if (T->isSpecificBuiltinType(BuiltinType::Double) || 832 T->isSpecificBuiltinType(BuiltinType::LongLong)) 833 return std::max(ABIAlign, (unsigned)getTypeSize(T)); 834 835 return ABIAlign; 836} 837 838static void CollectLocalObjCIvars(ASTContext *Ctx, 839 const ObjCInterfaceDecl *OI, 840 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 841 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 842 E = OI->ivar_end(); I != E; ++I) { 843 ObjCIvarDecl *IVDecl = *I; 844 if (!IVDecl->isInvalidDecl()) 845 Fields.push_back(cast<FieldDecl>(IVDecl)); 846 } 847} 848 849void ASTContext::CollectObjCIvars(const ObjCInterfaceDecl *OI, 850 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 851 if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass()) 852 CollectObjCIvars(SuperClass, Fields); 853 CollectLocalObjCIvars(this, OI, Fields); 854} 855 856/// ShallowCollectObjCIvars - 857/// Collect all ivars, including those synthesized, in the current class. 858/// 859void ASTContext::ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 860 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars, 861 bool CollectSynthesized) { 862 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 863 E = OI->ivar_end(); I != E; ++I) { 864 Ivars.push_back(*I); 865 } 866 if (CollectSynthesized) 867 CollectSynthesizedIvars(OI, Ivars); 868} 869 870void ASTContext::CollectProtocolSynthesizedIvars(const ObjCProtocolDecl *PD, 871 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 872 for (ObjCContainerDecl::prop_iterator I = PD->prop_begin(), 873 E = PD->prop_end(); I != E; ++I) 874 if (ObjCIvarDecl *Ivar = (*I)->getPropertyIvarDecl()) 875 Ivars.push_back(Ivar); 876 877 // Also look into nested protocols. 878 for (ObjCProtocolDecl::protocol_iterator P = PD->protocol_begin(), 879 E = PD->protocol_end(); P != E; ++P) 880 CollectProtocolSynthesizedIvars(*P, Ivars); 881} 882 883/// CollectSynthesizedIvars - 884/// This routine collect synthesized ivars for the designated class. 885/// 886void ASTContext::CollectSynthesizedIvars(const ObjCInterfaceDecl *OI, 887 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 888 for (ObjCInterfaceDecl::prop_iterator I = OI->prop_begin(), 889 E = OI->prop_end(); I != E; ++I) { 890 if (ObjCIvarDecl *Ivar = (*I)->getPropertyIvarDecl()) 891 Ivars.push_back(Ivar); 892 } 893 // Also look into interface's protocol list for properties declared 894 // in the protocol and whose ivars are synthesized. 895 for (ObjCInterfaceDecl::protocol_iterator P = OI->protocol_begin(), 896 PE = OI->protocol_end(); P != PE; ++P) { 897 ObjCProtocolDecl *PD = (*P); 898 CollectProtocolSynthesizedIvars(PD, Ivars); 899 } 900} 901 902/// CollectInheritedProtocols - Collect all protocols in current class and 903/// those inherited by it. 904void ASTContext::CollectInheritedProtocols(const Decl *CDecl, 905 llvm::SmallVectorImpl<ObjCProtocolDecl*> &Protocols) { 906 if (const ObjCInterfaceDecl *OI = dyn_cast<ObjCInterfaceDecl>(CDecl)) { 907 for (ObjCInterfaceDecl::protocol_iterator P = OI->protocol_begin(), 908 PE = OI->protocol_end(); P != PE; ++P) { 909 ObjCProtocolDecl *Proto = (*P); 910 Protocols.push_back(Proto); 911 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 912 PE = Proto->protocol_end(); P != PE; ++P) 913 CollectInheritedProtocols(*P, Protocols); 914 } 915 916 // Categories of this Interface. 917 for (const ObjCCategoryDecl *CDeclChain = OI->getCategoryList(); 918 CDeclChain; CDeclChain = CDeclChain->getNextClassCategory()) 919 CollectInheritedProtocols(CDeclChain, Protocols); 920 if (ObjCInterfaceDecl *SD = OI->getSuperClass()) 921 while (SD) { 922 CollectInheritedProtocols(SD, Protocols); 923 SD = SD->getSuperClass(); 924 } 925 return; 926 } 927 if (const ObjCCategoryDecl *OC = dyn_cast<ObjCCategoryDecl>(CDecl)) { 928 for (ObjCInterfaceDecl::protocol_iterator P = OC->protocol_begin(), 929 PE = OC->protocol_end(); P != PE; ++P) { 930 ObjCProtocolDecl *Proto = (*P); 931 Protocols.push_back(Proto); 932 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 933 PE = Proto->protocol_end(); P != PE; ++P) 934 CollectInheritedProtocols(*P, Protocols); 935 } 936 return; 937 } 938 if (const ObjCProtocolDecl *OP = dyn_cast<ObjCProtocolDecl>(CDecl)) { 939 for (ObjCProtocolDecl::protocol_iterator P = OP->protocol_begin(), 940 PE = OP->protocol_end(); P != PE; ++P) { 941 ObjCProtocolDecl *Proto = (*P); 942 Protocols.push_back(Proto); 943 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 944 PE = Proto->protocol_end(); P != PE; ++P) 945 CollectInheritedProtocols(*P, Protocols); 946 } 947 return; 948 } 949} 950 951unsigned ASTContext::CountProtocolSynthesizedIvars(const ObjCProtocolDecl *PD) { 952 unsigned count = 0; 953 for (ObjCContainerDecl::prop_iterator I = PD->prop_begin(), 954 E = PD->prop_end(); I != E; ++I) 955 if ((*I)->getPropertyIvarDecl()) 956 ++count; 957 958 // Also look into nested protocols. 959 for (ObjCProtocolDecl::protocol_iterator P = PD->protocol_begin(), 960 E = PD->protocol_end(); P != E; ++P) 961 count += CountProtocolSynthesizedIvars(*P); 962 return count; 963} 964 965unsigned ASTContext::CountSynthesizedIvars(const ObjCInterfaceDecl *OI) { 966 unsigned count = 0; 967 for (ObjCInterfaceDecl::prop_iterator I = OI->prop_begin(), 968 E = OI->prop_end(); I != E; ++I) { 969 if ((*I)->getPropertyIvarDecl()) 970 ++count; 971 } 972 // Also look into interface's protocol list for properties declared 973 // in the protocol and whose ivars are synthesized. 974 for (ObjCInterfaceDecl::protocol_iterator P = OI->protocol_begin(), 975 PE = OI->protocol_end(); P != PE; ++P) { 976 ObjCProtocolDecl *PD = (*P); 977 count += CountProtocolSynthesizedIvars(PD); 978 } 979 return count; 980} 981 982/// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 983ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) { 984 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 985 I = ObjCImpls.find(D); 986 if (I != ObjCImpls.end()) 987 return cast<ObjCImplementationDecl>(I->second); 988 return 0; 989} 990/// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 991ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) { 992 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 993 I = ObjCImpls.find(D); 994 if (I != ObjCImpls.end()) 995 return cast<ObjCCategoryImplDecl>(I->second); 996 return 0; 997} 998 999/// \brief Set the implementation of ObjCInterfaceDecl. 1000void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD, 1001 ObjCImplementationDecl *ImplD) { 1002 assert(IFaceD && ImplD && "Passed null params"); 1003 ObjCImpls[IFaceD] = ImplD; 1004} 1005/// \brief Set the implementation of ObjCCategoryDecl. 1006void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD, 1007 ObjCCategoryImplDecl *ImplD) { 1008 assert(CatD && ImplD && "Passed null params"); 1009 ObjCImpls[CatD] = ImplD; 1010} 1011 1012/// \brief Allocate an uninitialized TypeSourceInfo. 1013/// 1014/// The caller should initialize the memory held by TypeSourceInfo using 1015/// the TypeLoc wrappers. 1016/// 1017/// \param T the type that will be the basis for type source info. This type 1018/// should refer to how the declarator was written in source code, not to 1019/// what type semantic analysis resolved the declarator to. 1020TypeSourceInfo *ASTContext::CreateTypeSourceInfo(QualType T, 1021 unsigned DataSize) { 1022 if (!DataSize) 1023 DataSize = TypeLoc::getFullDataSizeForType(T); 1024 else 1025 assert(DataSize == TypeLoc::getFullDataSizeForType(T) && 1026 "incorrect data size provided to CreateTypeSourceInfo!"); 1027 1028 TypeSourceInfo *TInfo = 1029 (TypeSourceInfo*)BumpAlloc.Allocate(sizeof(TypeSourceInfo) + DataSize, 8); 1030 new (TInfo) TypeSourceInfo(T); 1031 return TInfo; 1032} 1033 1034TypeSourceInfo *ASTContext::getTrivialTypeSourceInfo(QualType T, 1035 SourceLocation L) { 1036 TypeSourceInfo *DI = CreateTypeSourceInfo(T); 1037 DI->getTypeLoc().initialize(L); 1038 return DI; 1039} 1040 1041/// getInterfaceLayoutImpl - Get or compute information about the 1042/// layout of the given interface. 1043/// 1044/// \param Impl - If given, also include the layout of the interface's 1045/// implementation. This may differ by including synthesized ivars. 1046const ASTRecordLayout & 1047ASTContext::getObjCLayout(const ObjCInterfaceDecl *D, 1048 const ObjCImplementationDecl *Impl) { 1049 assert(!D->isForwardDecl() && "Invalid interface decl!"); 1050 1051 // Look up this layout, if already laid out, return what we have. 1052 ObjCContainerDecl *Key = 1053 Impl ? (ObjCContainerDecl*) Impl : (ObjCContainerDecl*) D; 1054 if (const ASTRecordLayout *Entry = ObjCLayouts[Key]) 1055 return *Entry; 1056 1057 // Add in synthesized ivar count if laying out an implementation. 1058 if (Impl) { 1059 unsigned FieldCount = D->ivar_size(); 1060 unsigned SynthCount = CountSynthesizedIvars(D); 1061 FieldCount += SynthCount; 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 1203QualType ASTContext::getNoReturnType(QualType T) { 1204 QualType ResultType; 1205 if (T->isPointerType()) { 1206 QualType Pointee = T->getAs<PointerType>()->getPointeeType(); 1207 ResultType = getNoReturnType(Pointee); 1208 ResultType = getPointerType(ResultType); 1209 } else if (T->isBlockPointerType()) { 1210 QualType Pointee = T->getAs<BlockPointerType>()->getPointeeType(); 1211 ResultType = getNoReturnType(Pointee); 1212 ResultType = getBlockPointerType(ResultType); 1213 } else { 1214 assert (T->isFunctionType() 1215 && "can't noreturn qualify non-pointer to function or block type"); 1216 1217 if (const FunctionNoProtoType *FNPT = T->getAs<FunctionNoProtoType>()) { 1218 ResultType = getFunctionNoProtoType(FNPT->getResultType(), true); 1219 } else { 1220 const FunctionProtoType *F = T->getAs<FunctionProtoType>(); 1221 ResultType 1222 = getFunctionType(F->getResultType(), F->arg_type_begin(), 1223 F->getNumArgs(), F->isVariadic(), F->getTypeQuals(), 1224 F->hasExceptionSpec(), F->hasAnyExceptionSpec(), 1225 F->getNumExceptions(), F->exception_begin(), true); 1226 } 1227 } 1228 1229 return getQualifiedType(ResultType, T.getLocalQualifiers()); 1230} 1231 1232/// getComplexType - Return the uniqued reference to the type for a complex 1233/// number with the specified element type. 1234QualType ASTContext::getComplexType(QualType T) { 1235 // Unique pointers, to guarantee there is only one pointer of a particular 1236 // structure. 1237 llvm::FoldingSetNodeID ID; 1238 ComplexType::Profile(ID, T); 1239 1240 void *InsertPos = 0; 1241 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1242 return QualType(CT, 0); 1243 1244 // If the pointee type isn't canonical, this won't be a canonical type either, 1245 // so fill in the canonical type field. 1246 QualType Canonical; 1247 if (!T.isCanonical()) { 1248 Canonical = getComplexType(getCanonicalType(T)); 1249 1250 // Get the new insert position for the node we care about. 1251 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 1252 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1253 } 1254 ComplexType *New = new (*this, TypeAlignment) ComplexType(T, Canonical); 1255 Types.push_back(New); 1256 ComplexTypes.InsertNode(New, InsertPos); 1257 return QualType(New, 0); 1258} 1259 1260QualType ASTContext::getFixedWidthIntType(unsigned Width, bool Signed) { 1261 llvm::DenseMap<unsigned, FixedWidthIntType*> &Map = Signed ? 1262 SignedFixedWidthIntTypes : UnsignedFixedWidthIntTypes; 1263 FixedWidthIntType *&Entry = Map[Width]; 1264 if (!Entry) 1265 Entry = new FixedWidthIntType(Width, Signed); 1266 return QualType(Entry, 0); 1267} 1268 1269/// getPointerType - Return the uniqued reference to the type for a pointer to 1270/// the specified type. 1271QualType ASTContext::getPointerType(QualType T) { 1272 // Unique pointers, to guarantee there is only one pointer of a particular 1273 // structure. 1274 llvm::FoldingSetNodeID ID; 1275 PointerType::Profile(ID, T); 1276 1277 void *InsertPos = 0; 1278 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1279 return QualType(PT, 0); 1280 1281 // If the pointee type isn't canonical, this won't be a canonical type either, 1282 // so fill in the canonical type field. 1283 QualType Canonical; 1284 if (!T.isCanonical()) { 1285 Canonical = getPointerType(getCanonicalType(T)); 1286 1287 // Get the new insert position for the node we care about. 1288 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1289 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1290 } 1291 PointerType *New = new (*this, TypeAlignment) PointerType(T, Canonical); 1292 Types.push_back(New); 1293 PointerTypes.InsertNode(New, InsertPos); 1294 return QualType(New, 0); 1295} 1296 1297/// getBlockPointerType - Return the uniqued reference to the type for 1298/// a pointer to the specified block. 1299QualType ASTContext::getBlockPointerType(QualType T) { 1300 assert(T->isFunctionType() && "block of function types only"); 1301 // Unique pointers, to guarantee there is only one block of a particular 1302 // structure. 1303 llvm::FoldingSetNodeID ID; 1304 BlockPointerType::Profile(ID, T); 1305 1306 void *InsertPos = 0; 1307 if (BlockPointerType *PT = 1308 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1309 return QualType(PT, 0); 1310 1311 // If the block pointee type isn't canonical, this won't be a canonical 1312 // type either so fill in the canonical type field. 1313 QualType Canonical; 1314 if (!T.isCanonical()) { 1315 Canonical = getBlockPointerType(getCanonicalType(T)); 1316 1317 // Get the new insert position for the node we care about. 1318 BlockPointerType *NewIP = 1319 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1320 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1321 } 1322 BlockPointerType *New 1323 = new (*this, TypeAlignment) BlockPointerType(T, Canonical); 1324 Types.push_back(New); 1325 BlockPointerTypes.InsertNode(New, InsertPos); 1326 return QualType(New, 0); 1327} 1328 1329/// getLValueReferenceType - Return the uniqued reference to the type for an 1330/// lvalue reference to the specified type. 1331QualType ASTContext::getLValueReferenceType(QualType T, bool SpelledAsLValue) { 1332 // Unique pointers, to guarantee there is only one pointer of a particular 1333 // structure. 1334 llvm::FoldingSetNodeID ID; 1335 ReferenceType::Profile(ID, T, SpelledAsLValue); 1336 1337 void *InsertPos = 0; 1338 if (LValueReferenceType *RT = 1339 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1340 return QualType(RT, 0); 1341 1342 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1343 1344 // If the referencee type isn't canonical, this won't be a canonical type 1345 // either, so fill in the canonical type field. 1346 QualType Canonical; 1347 if (!SpelledAsLValue || InnerRef || !T.isCanonical()) { 1348 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1349 Canonical = getLValueReferenceType(getCanonicalType(PointeeType)); 1350 1351 // Get the new insert position for the node we care about. 1352 LValueReferenceType *NewIP = 1353 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1354 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1355 } 1356 1357 LValueReferenceType *New 1358 = new (*this, TypeAlignment) LValueReferenceType(T, Canonical, 1359 SpelledAsLValue); 1360 Types.push_back(New); 1361 LValueReferenceTypes.InsertNode(New, InsertPos); 1362 1363 return QualType(New, 0); 1364} 1365 1366/// getRValueReferenceType - Return the uniqued reference to the type for an 1367/// rvalue reference to the specified type. 1368QualType ASTContext::getRValueReferenceType(QualType T) { 1369 // Unique pointers, to guarantee there is only one pointer of a particular 1370 // structure. 1371 llvm::FoldingSetNodeID ID; 1372 ReferenceType::Profile(ID, T, false); 1373 1374 void *InsertPos = 0; 1375 if (RValueReferenceType *RT = 1376 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1377 return QualType(RT, 0); 1378 1379 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1380 1381 // If the referencee type isn't canonical, this won't be a canonical type 1382 // either, so fill in the canonical type field. 1383 QualType Canonical; 1384 if (InnerRef || !T.isCanonical()) { 1385 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1386 Canonical = getRValueReferenceType(getCanonicalType(PointeeType)); 1387 1388 // Get the new insert position for the node we care about. 1389 RValueReferenceType *NewIP = 1390 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1391 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1392 } 1393 1394 RValueReferenceType *New 1395 = new (*this, TypeAlignment) RValueReferenceType(T, Canonical); 1396 Types.push_back(New); 1397 RValueReferenceTypes.InsertNode(New, InsertPos); 1398 return QualType(New, 0); 1399} 1400 1401/// getMemberPointerType - Return the uniqued reference to the type for a 1402/// member pointer to the specified type, in the specified class. 1403QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) { 1404 // Unique pointers, to guarantee there is only one pointer of a particular 1405 // structure. 1406 llvm::FoldingSetNodeID ID; 1407 MemberPointerType::Profile(ID, T, Cls); 1408 1409 void *InsertPos = 0; 1410 if (MemberPointerType *PT = 1411 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1412 return QualType(PT, 0); 1413 1414 // If the pointee or class type isn't canonical, this won't be a canonical 1415 // type either, so fill in the canonical type field. 1416 QualType Canonical; 1417 if (!T.isCanonical() || !Cls->isCanonicalUnqualified()) { 1418 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1419 1420 // Get the new insert position for the node we care about. 1421 MemberPointerType *NewIP = 1422 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1423 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1424 } 1425 MemberPointerType *New 1426 = new (*this, TypeAlignment) MemberPointerType(T, Cls, Canonical); 1427 Types.push_back(New); 1428 MemberPointerTypes.InsertNode(New, InsertPos); 1429 return QualType(New, 0); 1430} 1431 1432/// getConstantArrayType - Return the unique reference to the type for an 1433/// array of the specified element type. 1434QualType ASTContext::getConstantArrayType(QualType EltTy, 1435 const llvm::APInt &ArySizeIn, 1436 ArrayType::ArraySizeModifier ASM, 1437 unsigned EltTypeQuals) { 1438 assert((EltTy->isDependentType() || 1439 EltTy->isIncompleteType() || EltTy->isConstantSizeType()) && 1440 "Constant array of VLAs is illegal!"); 1441 1442 // Convert the array size into a canonical width matching the pointer size for 1443 // the target. 1444 llvm::APInt ArySize(ArySizeIn); 1445 ArySize.zextOrTrunc(Target.getPointerWidth(EltTy.getAddressSpace())); 1446 1447 llvm::FoldingSetNodeID ID; 1448 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, EltTypeQuals); 1449 1450 void *InsertPos = 0; 1451 if (ConstantArrayType *ATP = 1452 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1453 return QualType(ATP, 0); 1454 1455 // If the element type isn't canonical, this won't be a canonical type either, 1456 // so fill in the canonical type field. 1457 QualType Canonical; 1458 if (!EltTy.isCanonical()) { 1459 Canonical = getConstantArrayType(getCanonicalType(EltTy), ArySize, 1460 ASM, EltTypeQuals); 1461 // Get the new insert position for the node we care about. 1462 ConstantArrayType *NewIP = 1463 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1464 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1465 } 1466 1467 ConstantArrayType *New = new(*this,TypeAlignment) 1468 ConstantArrayType(EltTy, Canonical, ArySize, ASM, EltTypeQuals); 1469 ConstantArrayTypes.InsertNode(New, InsertPos); 1470 Types.push_back(New); 1471 return QualType(New, 0); 1472} 1473 1474/// getVariableArrayType - Returns a non-unique reference to the type for a 1475/// variable array of the specified element type. 1476QualType ASTContext::getVariableArrayType(QualType EltTy, 1477 Expr *NumElts, 1478 ArrayType::ArraySizeModifier ASM, 1479 unsigned EltTypeQuals, 1480 SourceRange Brackets) { 1481 // Since we don't unique expressions, it isn't possible to unique VLA's 1482 // that have an expression provided for their size. 1483 1484 VariableArrayType *New = new(*this, TypeAlignment) 1485 VariableArrayType(EltTy, QualType(), NumElts, ASM, EltTypeQuals, Brackets); 1486 1487 VariableArrayTypes.push_back(New); 1488 Types.push_back(New); 1489 return QualType(New, 0); 1490} 1491 1492/// getDependentSizedArrayType - Returns a non-unique reference to 1493/// the type for a dependently-sized array of the specified element 1494/// type. 1495QualType ASTContext::getDependentSizedArrayType(QualType EltTy, 1496 Expr *NumElts, 1497 ArrayType::ArraySizeModifier ASM, 1498 unsigned EltTypeQuals, 1499 SourceRange Brackets) { 1500 assert((!NumElts || NumElts->isTypeDependent() || 1501 NumElts->isValueDependent()) && 1502 "Size must be type- or value-dependent!"); 1503 1504 void *InsertPos = 0; 1505 DependentSizedArrayType *Canon = 0; 1506 1507 if (NumElts) { 1508 // Dependently-sized array types that do not have a specified 1509 // number of elements will have their sizes deduced from an 1510 // initializer. 1511 llvm::FoldingSetNodeID ID; 1512 DependentSizedArrayType::Profile(ID, *this, getCanonicalType(EltTy), ASM, 1513 EltTypeQuals, NumElts); 1514 1515 Canon = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1516 } 1517 1518 DependentSizedArrayType *New; 1519 if (Canon) { 1520 // We already have a canonical version of this array type; use it as 1521 // the canonical type for a newly-built type. 1522 New = new (*this, TypeAlignment) 1523 DependentSizedArrayType(*this, EltTy, QualType(Canon, 0), 1524 NumElts, ASM, EltTypeQuals, Brackets); 1525 } else { 1526 QualType CanonEltTy = getCanonicalType(EltTy); 1527 if (CanonEltTy == EltTy) { 1528 New = new (*this, TypeAlignment) 1529 DependentSizedArrayType(*this, EltTy, QualType(), 1530 NumElts, ASM, EltTypeQuals, Brackets); 1531 1532 if (NumElts) 1533 DependentSizedArrayTypes.InsertNode(New, InsertPos); 1534 } else { 1535 QualType Canon = getDependentSizedArrayType(CanonEltTy, NumElts, 1536 ASM, EltTypeQuals, 1537 SourceRange()); 1538 New = new (*this, TypeAlignment) 1539 DependentSizedArrayType(*this, EltTy, Canon, 1540 NumElts, ASM, EltTypeQuals, Brackets); 1541 } 1542 } 1543 1544 Types.push_back(New); 1545 return QualType(New, 0); 1546} 1547 1548QualType ASTContext::getIncompleteArrayType(QualType EltTy, 1549 ArrayType::ArraySizeModifier ASM, 1550 unsigned EltTypeQuals) { 1551 llvm::FoldingSetNodeID ID; 1552 IncompleteArrayType::Profile(ID, EltTy, ASM, EltTypeQuals); 1553 1554 void *InsertPos = 0; 1555 if (IncompleteArrayType *ATP = 1556 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1557 return QualType(ATP, 0); 1558 1559 // If the element type isn't canonical, this won't be a canonical type 1560 // either, so fill in the canonical type field. 1561 QualType Canonical; 1562 1563 if (!EltTy.isCanonical()) { 1564 Canonical = getIncompleteArrayType(getCanonicalType(EltTy), 1565 ASM, EltTypeQuals); 1566 1567 // Get the new insert position for the node we care about. 1568 IncompleteArrayType *NewIP = 1569 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1570 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1571 } 1572 1573 IncompleteArrayType *New = new (*this, TypeAlignment) 1574 IncompleteArrayType(EltTy, Canonical, ASM, EltTypeQuals); 1575 1576 IncompleteArrayTypes.InsertNode(New, InsertPos); 1577 Types.push_back(New); 1578 return QualType(New, 0); 1579} 1580 1581/// getVectorType - Return the unique reference to a vector type of 1582/// the specified element type and size. VectorType must be a built-in type. 1583QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts) { 1584 BuiltinType *baseType; 1585 1586 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1587 assert(baseType != 0 && "getVectorType(): Expecting a built-in type"); 1588 1589 // Check if we've already instantiated a vector of this type. 1590 llvm::FoldingSetNodeID ID; 1591 VectorType::Profile(ID, vecType, NumElts, Type::Vector); 1592 void *InsertPos = 0; 1593 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1594 return QualType(VTP, 0); 1595 1596 // If the element type isn't canonical, this won't be a canonical type either, 1597 // so fill in the canonical type field. 1598 QualType Canonical; 1599 if (!vecType.isCanonical()) { 1600 Canonical = getVectorType(getCanonicalType(vecType), NumElts); 1601 1602 // Get the new insert position for the node we care about. 1603 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1604 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1605 } 1606 VectorType *New = new (*this, TypeAlignment) 1607 VectorType(vecType, NumElts, Canonical); 1608 VectorTypes.InsertNode(New, InsertPos); 1609 Types.push_back(New); 1610 return QualType(New, 0); 1611} 1612 1613/// getExtVectorType - Return the unique reference to an extended vector type of 1614/// the specified element type and size. VectorType must be a built-in type. 1615QualType ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) { 1616 BuiltinType *baseType; 1617 1618 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1619 assert(baseType != 0 && "getExtVectorType(): Expecting a built-in type"); 1620 1621 // Check if we've already instantiated a vector of this type. 1622 llvm::FoldingSetNodeID ID; 1623 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector); 1624 void *InsertPos = 0; 1625 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1626 return QualType(VTP, 0); 1627 1628 // If the element type isn't canonical, this won't be a canonical type either, 1629 // so fill in the canonical type field. 1630 QualType Canonical; 1631 if (!vecType.isCanonical()) { 1632 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 1633 1634 // Get the new insert position for the node we care about. 1635 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1636 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1637 } 1638 ExtVectorType *New = new (*this, TypeAlignment) 1639 ExtVectorType(vecType, NumElts, Canonical); 1640 VectorTypes.InsertNode(New, InsertPos); 1641 Types.push_back(New); 1642 return QualType(New, 0); 1643} 1644 1645QualType ASTContext::getDependentSizedExtVectorType(QualType vecType, 1646 Expr *SizeExpr, 1647 SourceLocation AttrLoc) { 1648 llvm::FoldingSetNodeID ID; 1649 DependentSizedExtVectorType::Profile(ID, *this, getCanonicalType(vecType), 1650 SizeExpr); 1651 1652 void *InsertPos = 0; 1653 DependentSizedExtVectorType *Canon 1654 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1655 DependentSizedExtVectorType *New; 1656 if (Canon) { 1657 // We already have a canonical version of this array type; use it as 1658 // the canonical type for a newly-built type. 1659 New = new (*this, TypeAlignment) 1660 DependentSizedExtVectorType(*this, vecType, QualType(Canon, 0), 1661 SizeExpr, AttrLoc); 1662 } else { 1663 QualType CanonVecTy = getCanonicalType(vecType); 1664 if (CanonVecTy == vecType) { 1665 New = new (*this, TypeAlignment) 1666 DependentSizedExtVectorType(*this, vecType, QualType(), SizeExpr, 1667 AttrLoc); 1668 DependentSizedExtVectorTypes.InsertNode(New, InsertPos); 1669 } else { 1670 QualType Canon = getDependentSizedExtVectorType(CanonVecTy, SizeExpr, 1671 SourceLocation()); 1672 New = new (*this, TypeAlignment) 1673 DependentSizedExtVectorType(*this, vecType, Canon, SizeExpr, AttrLoc); 1674 } 1675 } 1676 1677 Types.push_back(New); 1678 return QualType(New, 0); 1679} 1680 1681/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 1682/// 1683QualType ASTContext::getFunctionNoProtoType(QualType ResultTy, bool NoReturn) { 1684 // Unique functions, to guarantee there is only one function of a particular 1685 // structure. 1686 llvm::FoldingSetNodeID ID; 1687 FunctionNoProtoType::Profile(ID, ResultTy, NoReturn); 1688 1689 void *InsertPos = 0; 1690 if (FunctionNoProtoType *FT = 1691 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1692 return QualType(FT, 0); 1693 1694 QualType Canonical; 1695 if (!ResultTy.isCanonical()) { 1696 Canonical = getFunctionNoProtoType(getCanonicalType(ResultTy), NoReturn); 1697 1698 // Get the new insert position for the node we care about. 1699 FunctionNoProtoType *NewIP = 1700 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1701 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1702 } 1703 1704 FunctionNoProtoType *New = new (*this, TypeAlignment) 1705 FunctionNoProtoType(ResultTy, Canonical, NoReturn); 1706 Types.push_back(New); 1707 FunctionNoProtoTypes.InsertNode(New, InsertPos); 1708 return QualType(New, 0); 1709} 1710 1711/// getFunctionType - Return a normal function type with a typed argument 1712/// list. isVariadic indicates whether the argument list includes '...'. 1713QualType ASTContext::getFunctionType(QualType ResultTy,const QualType *ArgArray, 1714 unsigned NumArgs, bool isVariadic, 1715 unsigned TypeQuals, bool hasExceptionSpec, 1716 bool hasAnyExceptionSpec, unsigned NumExs, 1717 const QualType *ExArray, bool NoReturn) { 1718 // Unique functions, to guarantee there is only one function of a particular 1719 // structure. 1720 llvm::FoldingSetNodeID ID; 1721 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, isVariadic, 1722 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1723 NumExs, ExArray, NoReturn); 1724 1725 void *InsertPos = 0; 1726 if (FunctionProtoType *FTP = 1727 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1728 return QualType(FTP, 0); 1729 1730 // Determine whether the type being created is already canonical or not. 1731 bool isCanonical = !hasExceptionSpec && ResultTy.isCanonical(); 1732 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 1733 if (!ArgArray[i].isCanonicalAsParam()) 1734 isCanonical = false; 1735 1736 // If this type isn't canonical, get the canonical version of it. 1737 // The exception spec is not part of the canonical type. 1738 QualType Canonical; 1739 if (!isCanonical) { 1740 llvm::SmallVector<QualType, 16> CanonicalArgs; 1741 CanonicalArgs.reserve(NumArgs); 1742 for (unsigned i = 0; i != NumArgs; ++i) 1743 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i])); 1744 1745 Canonical = getFunctionType(getCanonicalType(ResultTy), 1746 CanonicalArgs.data(), NumArgs, 1747 isVariadic, TypeQuals, false, 1748 false, 0, 0, NoReturn); 1749 1750 // Get the new insert position for the node we care about. 1751 FunctionProtoType *NewIP = 1752 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1753 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1754 } 1755 1756 // FunctionProtoType objects are allocated with extra bytes after them 1757 // for two variable size arrays (for parameter and exception types) at the 1758 // end of them. 1759 FunctionProtoType *FTP = 1760 (FunctionProtoType*)Allocate(sizeof(FunctionProtoType) + 1761 NumArgs*sizeof(QualType) + 1762 NumExs*sizeof(QualType), TypeAlignment); 1763 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, isVariadic, 1764 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1765 ExArray, NumExs, Canonical, NoReturn); 1766 Types.push_back(FTP); 1767 FunctionProtoTypes.InsertNode(FTP, InsertPos); 1768 return QualType(FTP, 0); 1769} 1770 1771/// getTypeDeclType - Return the unique reference to the type for the 1772/// specified type declaration. 1773QualType ASTContext::getTypeDeclType(TypeDecl *Decl, TypeDecl* PrevDecl) { 1774 assert(Decl && "Passed null for Decl param"); 1775 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1776 1777 if (TypedefDecl *Typedef = dyn_cast<TypedefDecl>(Decl)) 1778 return getTypedefType(Typedef); 1779 else if (isa<TemplateTypeParmDecl>(Decl)) { 1780 assert(false && "Template type parameter types are always available."); 1781 } else if (ObjCInterfaceDecl *ObjCInterface 1782 = dyn_cast<ObjCInterfaceDecl>(Decl)) 1783 return getObjCInterfaceType(ObjCInterface); 1784 1785 if (RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 1786 if (PrevDecl) 1787 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1788 else 1789 Decl->TypeForDecl = new (*this, TypeAlignment) RecordType(Record); 1790 } else if (EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 1791 if (PrevDecl) 1792 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1793 else 1794 Decl->TypeForDecl = new (*this, TypeAlignment) EnumType(Enum); 1795 } else if (UnresolvedUsingTypenameDecl *Using = 1796 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) { 1797 Decl->TypeForDecl = new (*this, TypeAlignment) UnresolvedUsingType(Using); 1798 } else 1799 assert(false && "TypeDecl without a type?"); 1800 1801 if (!PrevDecl) Types.push_back(Decl->TypeForDecl); 1802 return QualType(Decl->TypeForDecl, 0); 1803} 1804 1805/// getTypedefType - Return the unique reference to the type for the 1806/// specified typename decl. 1807QualType ASTContext::getTypedefType(TypedefDecl *Decl) { 1808 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1809 1810 QualType Canonical = getCanonicalType(Decl->getUnderlyingType()); 1811 Decl->TypeForDecl = new(*this, TypeAlignment) 1812 TypedefType(Type::Typedef, Decl, Canonical); 1813 Types.push_back(Decl->TypeForDecl); 1814 return QualType(Decl->TypeForDecl, 0); 1815} 1816 1817/// \brief Retrieve a substitution-result type. 1818QualType 1819ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm, 1820 QualType Replacement) { 1821 assert(Replacement.isCanonical() 1822 && "replacement types must always be canonical"); 1823 1824 llvm::FoldingSetNodeID ID; 1825 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement); 1826 void *InsertPos = 0; 1827 SubstTemplateTypeParmType *SubstParm 1828 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1829 1830 if (!SubstParm) { 1831 SubstParm = new (*this, TypeAlignment) 1832 SubstTemplateTypeParmType(Parm, Replacement); 1833 Types.push_back(SubstParm); 1834 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 1835 } 1836 1837 return QualType(SubstParm, 0); 1838} 1839 1840/// \brief Retrieve the template type parameter type for a template 1841/// parameter or parameter pack with the given depth, index, and (optionally) 1842/// name. 1843QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 1844 bool ParameterPack, 1845 IdentifierInfo *Name) { 1846 llvm::FoldingSetNodeID ID; 1847 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, Name); 1848 void *InsertPos = 0; 1849 TemplateTypeParmType *TypeParm 1850 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1851 1852 if (TypeParm) 1853 return QualType(TypeParm, 0); 1854 1855 if (Name) { 1856 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 1857 TypeParm = new (*this, TypeAlignment) 1858 TemplateTypeParmType(Depth, Index, ParameterPack, Name, Canon); 1859 } else 1860 TypeParm = new (*this, TypeAlignment) 1861 TemplateTypeParmType(Depth, Index, ParameterPack); 1862 1863 Types.push_back(TypeParm); 1864 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 1865 1866 return QualType(TypeParm, 0); 1867} 1868 1869QualType 1870ASTContext::getTemplateSpecializationType(TemplateName Template, 1871 const TemplateArgumentListInfo &Args, 1872 QualType Canon) { 1873 unsigned NumArgs = Args.size(); 1874 1875 llvm::SmallVector<TemplateArgument, 4> ArgVec; 1876 ArgVec.reserve(NumArgs); 1877 for (unsigned i = 0; i != NumArgs; ++i) 1878 ArgVec.push_back(Args[i].getArgument()); 1879 1880 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs, Canon); 1881} 1882 1883QualType 1884ASTContext::getTemplateSpecializationType(TemplateName Template, 1885 const TemplateArgument *Args, 1886 unsigned NumArgs, 1887 QualType Canon) { 1888 if (!Canon.isNull()) 1889 Canon = getCanonicalType(Canon); 1890 else { 1891 // Build the canonical template specialization type. 1892 TemplateName CanonTemplate = getCanonicalTemplateName(Template); 1893 llvm::SmallVector<TemplateArgument, 4> CanonArgs; 1894 CanonArgs.reserve(NumArgs); 1895 for (unsigned I = 0; I != NumArgs; ++I) 1896 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I])); 1897 1898 // Determine whether this canonical template specialization type already 1899 // exists. 1900 llvm::FoldingSetNodeID ID; 1901 TemplateSpecializationType::Profile(ID, CanonTemplate, 1902 CanonArgs.data(), NumArgs, *this); 1903 1904 void *InsertPos = 0; 1905 TemplateSpecializationType *Spec 1906 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 1907 1908 if (!Spec) { 1909 // Allocate a new canonical template specialization type. 1910 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1911 sizeof(TemplateArgument) * NumArgs), 1912 TypeAlignment); 1913 Spec = new (Mem) TemplateSpecializationType(*this, CanonTemplate, 1914 CanonArgs.data(), NumArgs, 1915 Canon); 1916 Types.push_back(Spec); 1917 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 1918 } 1919 1920 if (Canon.isNull()) 1921 Canon = QualType(Spec, 0); 1922 assert(Canon->isDependentType() && 1923 "Non-dependent template-id type must have a canonical type"); 1924 } 1925 1926 // Allocate the (non-canonical) template specialization type, but don't 1927 // try to unique it: these types typically have location information that 1928 // we don't unique and don't want to lose. 1929 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1930 sizeof(TemplateArgument) * NumArgs), 1931 TypeAlignment); 1932 TemplateSpecializationType *Spec 1933 = new (Mem) TemplateSpecializationType(*this, Template, Args, NumArgs, 1934 Canon); 1935 1936 Types.push_back(Spec); 1937 return QualType(Spec, 0); 1938} 1939 1940QualType 1941ASTContext::getQualifiedNameType(NestedNameSpecifier *NNS, 1942 QualType NamedType) { 1943 llvm::FoldingSetNodeID ID; 1944 QualifiedNameType::Profile(ID, NNS, NamedType); 1945 1946 void *InsertPos = 0; 1947 QualifiedNameType *T 1948 = QualifiedNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1949 if (T) 1950 return QualType(T, 0); 1951 1952 T = new (*this) QualifiedNameType(NNS, NamedType, 1953 getCanonicalType(NamedType)); 1954 Types.push_back(T); 1955 QualifiedNameTypes.InsertNode(T, InsertPos); 1956 return QualType(T, 0); 1957} 1958 1959QualType ASTContext::getTypenameType(NestedNameSpecifier *NNS, 1960 const IdentifierInfo *Name, 1961 QualType Canon) { 1962 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 1963 1964 if (Canon.isNull()) { 1965 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 1966 if (CanonNNS != NNS) 1967 Canon = getTypenameType(CanonNNS, Name); 1968 } 1969 1970 llvm::FoldingSetNodeID ID; 1971 TypenameType::Profile(ID, NNS, Name); 1972 1973 void *InsertPos = 0; 1974 TypenameType *T 1975 = TypenameTypes.FindNodeOrInsertPos(ID, InsertPos); 1976 if (T) 1977 return QualType(T, 0); 1978 1979 T = new (*this) TypenameType(NNS, Name, Canon); 1980 Types.push_back(T); 1981 TypenameTypes.InsertNode(T, InsertPos); 1982 return QualType(T, 0); 1983} 1984 1985QualType 1986ASTContext::getTypenameType(NestedNameSpecifier *NNS, 1987 const TemplateSpecializationType *TemplateId, 1988 QualType Canon) { 1989 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 1990 1991 if (Canon.isNull()) { 1992 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 1993 QualType CanonType = getCanonicalType(QualType(TemplateId, 0)); 1994 if (CanonNNS != NNS || CanonType != QualType(TemplateId, 0)) { 1995 const TemplateSpecializationType *CanonTemplateId 1996 = CanonType->getAs<TemplateSpecializationType>(); 1997 assert(CanonTemplateId && 1998 "Canonical type must also be a template specialization type"); 1999 Canon = getTypenameType(CanonNNS, CanonTemplateId); 2000 } 2001 } 2002 2003 llvm::FoldingSetNodeID ID; 2004 TypenameType::Profile(ID, NNS, TemplateId); 2005 2006 void *InsertPos = 0; 2007 TypenameType *T 2008 = TypenameTypes.FindNodeOrInsertPos(ID, InsertPos); 2009 if (T) 2010 return QualType(T, 0); 2011 2012 T = new (*this) TypenameType(NNS, TemplateId, Canon); 2013 Types.push_back(T); 2014 TypenameTypes.InsertNode(T, InsertPos); 2015 return QualType(T, 0); 2016} 2017 2018QualType 2019ASTContext::getElaboratedType(QualType UnderlyingType, 2020 ElaboratedType::TagKind Tag) { 2021 llvm::FoldingSetNodeID ID; 2022 ElaboratedType::Profile(ID, UnderlyingType, Tag); 2023 2024 void *InsertPos = 0; 2025 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2026 if (T) 2027 return QualType(T, 0); 2028 2029 QualType Canon = getCanonicalType(UnderlyingType); 2030 2031 T = new (*this) ElaboratedType(UnderlyingType, Tag, Canon); 2032 Types.push_back(T); 2033 ElaboratedTypes.InsertNode(T, InsertPos); 2034 return QualType(T, 0); 2035} 2036 2037/// CmpProtocolNames - Comparison predicate for sorting protocols 2038/// alphabetically. 2039static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 2040 const ObjCProtocolDecl *RHS) { 2041 return LHS->getDeclName() < RHS->getDeclName(); 2042} 2043 2044static bool areSortedAndUniqued(ObjCProtocolDecl **Protocols, 2045 unsigned NumProtocols) { 2046 if (NumProtocols == 0) return true; 2047 2048 for (unsigned i = 1; i != NumProtocols; ++i) 2049 if (!CmpProtocolNames(Protocols[i-1], Protocols[i])) 2050 return false; 2051 return true; 2052} 2053 2054static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols, 2055 unsigned &NumProtocols) { 2056 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 2057 2058 // Sort protocols, keyed by name. 2059 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 2060 2061 // Remove duplicates. 2062 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 2063 NumProtocols = ProtocolsEnd-Protocols; 2064} 2065 2066/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 2067/// the given interface decl and the conforming protocol list. 2068QualType ASTContext::getObjCObjectPointerType(QualType InterfaceT, 2069 ObjCProtocolDecl **Protocols, 2070 unsigned NumProtocols) { 2071 llvm::FoldingSetNodeID ID; 2072 ObjCObjectPointerType::Profile(ID, InterfaceT, Protocols, NumProtocols); 2073 2074 void *InsertPos = 0; 2075 if (ObjCObjectPointerType *QT = 2076 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2077 return QualType(QT, 0); 2078 2079 // Sort the protocol list alphabetically to canonicalize it. 2080 QualType Canonical; 2081 if (!InterfaceT.isCanonical() || 2082 !areSortedAndUniqued(Protocols, NumProtocols)) { 2083 if (!areSortedAndUniqued(Protocols, NumProtocols)) { 2084 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(NumProtocols); 2085 unsigned UniqueCount = NumProtocols; 2086 2087 std::copy(Protocols, Protocols + NumProtocols, Sorted.begin()); 2088 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2089 2090 Canonical = getObjCObjectPointerType(getCanonicalType(InterfaceT), 2091 &Sorted[0], UniqueCount); 2092 } else { 2093 Canonical = getObjCObjectPointerType(getCanonicalType(InterfaceT), 2094 Protocols, NumProtocols); 2095 } 2096 2097 // Regenerate InsertPos. 2098 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2099 } 2100 2101 // No Match; 2102 ObjCObjectPointerType *QType = new (*this, TypeAlignment) 2103 ObjCObjectPointerType(Canonical, InterfaceT, Protocols, NumProtocols); 2104 2105 Types.push_back(QType); 2106 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 2107 return QualType(QType, 0); 2108} 2109 2110/// getObjCInterfaceType - Return the unique reference to the type for the 2111/// specified ObjC interface decl. The list of protocols is optional. 2112QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl, 2113 ObjCProtocolDecl **Protocols, unsigned NumProtocols) { 2114 llvm::FoldingSetNodeID ID; 2115 ObjCInterfaceType::Profile(ID, Decl, Protocols, NumProtocols); 2116 2117 void *InsertPos = 0; 2118 if (ObjCInterfaceType *QT = 2119 ObjCInterfaceTypes.FindNodeOrInsertPos(ID, InsertPos)) 2120 return QualType(QT, 0); 2121 2122 // Sort the protocol list alphabetically to canonicalize it. 2123 QualType Canonical; 2124 if (NumProtocols && !areSortedAndUniqued(Protocols, NumProtocols)) { 2125 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(NumProtocols); 2126 std::copy(Protocols, Protocols + NumProtocols, Sorted.begin()); 2127 2128 unsigned UniqueCount = NumProtocols; 2129 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2130 2131 Canonical = getObjCInterfaceType(Decl, &Sorted[0], UniqueCount); 2132 2133 ObjCInterfaceTypes.FindNodeOrInsertPos(ID, InsertPos); 2134 } 2135 2136 ObjCInterfaceType *QType = new (*this, TypeAlignment) 2137 ObjCInterfaceType(Canonical, const_cast<ObjCInterfaceDecl*>(Decl), 2138 Protocols, NumProtocols); 2139 2140 Types.push_back(QType); 2141 ObjCInterfaceTypes.InsertNode(QType, InsertPos); 2142 return QualType(QType, 0); 2143} 2144 2145/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 2146/// TypeOfExprType AST's (since expression's are never shared). For example, 2147/// multiple declarations that refer to "typeof(x)" all contain different 2148/// DeclRefExpr's. This doesn't effect the type checker, since it operates 2149/// on canonical type's (which are always unique). 2150QualType ASTContext::getTypeOfExprType(Expr *tofExpr) { 2151 TypeOfExprType *toe; 2152 if (tofExpr->isTypeDependent()) { 2153 llvm::FoldingSetNodeID ID; 2154 DependentTypeOfExprType::Profile(ID, *this, tofExpr); 2155 2156 void *InsertPos = 0; 2157 DependentTypeOfExprType *Canon 2158 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos); 2159 if (Canon) { 2160 // We already have a "canonical" version of an identical, dependent 2161 // typeof(expr) type. Use that as our canonical type. 2162 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, 2163 QualType((TypeOfExprType*)Canon, 0)); 2164 } 2165 else { 2166 // Build a new, canonical typeof(expr) type. 2167 Canon 2168 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr); 2169 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos); 2170 toe = Canon; 2171 } 2172 } else { 2173 QualType Canonical = getCanonicalType(tofExpr->getType()); 2174 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical); 2175 } 2176 Types.push_back(toe); 2177 return QualType(toe, 0); 2178} 2179 2180/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 2181/// TypeOfType AST's. The only motivation to unique these nodes would be 2182/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 2183/// an issue. This doesn't effect the type checker, since it operates 2184/// on canonical type's (which are always unique). 2185QualType ASTContext::getTypeOfType(QualType tofType) { 2186 QualType Canonical = getCanonicalType(tofType); 2187 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical); 2188 Types.push_back(tot); 2189 return QualType(tot, 0); 2190} 2191 2192/// getDecltypeForExpr - Given an expr, will return the decltype for that 2193/// expression, according to the rules in C++0x [dcl.type.simple]p4 2194static QualType getDecltypeForExpr(const Expr *e, ASTContext &Context) { 2195 if (e->isTypeDependent()) 2196 return Context.DependentTy; 2197 2198 // If e is an id expression or a class member access, decltype(e) is defined 2199 // as the type of the entity named by e. 2200 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 2201 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 2202 return VD->getType(); 2203 } 2204 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 2205 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 2206 return FD->getType(); 2207 } 2208 // If e is a function call or an invocation of an overloaded operator, 2209 // (parentheses around e are ignored), decltype(e) is defined as the 2210 // return type of that function. 2211 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 2212 return CE->getCallReturnType(); 2213 2214 QualType T = e->getType(); 2215 2216 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 2217 // defined as T&, otherwise decltype(e) is defined as T. 2218 if (e->isLvalue(Context) == Expr::LV_Valid) 2219 T = Context.getLValueReferenceType(T); 2220 2221 return T; 2222} 2223 2224/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 2225/// DecltypeType AST's. The only motivation to unique these nodes would be 2226/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 2227/// an issue. This doesn't effect the type checker, since it operates 2228/// on canonical type's (which are always unique). 2229QualType ASTContext::getDecltypeType(Expr *e) { 2230 DecltypeType *dt; 2231 if (e->isTypeDependent()) { 2232 llvm::FoldingSetNodeID ID; 2233 DependentDecltypeType::Profile(ID, *this, e); 2234 2235 void *InsertPos = 0; 2236 DependentDecltypeType *Canon 2237 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos); 2238 if (Canon) { 2239 // We already have a "canonical" version of an equivalent, dependent 2240 // decltype type. Use that as our canonical type. 2241 dt = new (*this, TypeAlignment) DecltypeType(e, DependentTy, 2242 QualType((DecltypeType*)Canon, 0)); 2243 } 2244 else { 2245 // Build a new, canonical typeof(expr) type. 2246 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e); 2247 DependentDecltypeTypes.InsertNode(Canon, InsertPos); 2248 dt = Canon; 2249 } 2250 } else { 2251 QualType T = getDecltypeForExpr(e, *this); 2252 dt = new (*this, TypeAlignment) DecltypeType(e, T, getCanonicalType(T)); 2253 } 2254 Types.push_back(dt); 2255 return QualType(dt, 0); 2256} 2257 2258/// getTagDeclType - Return the unique reference to the type for the 2259/// specified TagDecl (struct/union/class/enum) decl. 2260QualType ASTContext::getTagDeclType(const TagDecl *Decl) { 2261 assert (Decl); 2262 // FIXME: What is the design on getTagDeclType when it requires casting 2263 // away const? mutable? 2264 return getTypeDeclType(const_cast<TagDecl*>(Decl)); 2265} 2266 2267/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 2268/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 2269/// needs to agree with the definition in <stddef.h>. 2270QualType ASTContext::getSizeType() const { 2271 return getFromTargetType(Target.getSizeType()); 2272} 2273 2274/// getSignedWCharType - Return the type of "signed wchar_t". 2275/// Used when in C++, as a GCC extension. 2276QualType ASTContext::getSignedWCharType() const { 2277 // FIXME: derive from "Target" ? 2278 return WCharTy; 2279} 2280 2281/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 2282/// Used when in C++, as a GCC extension. 2283QualType ASTContext::getUnsignedWCharType() const { 2284 // FIXME: derive from "Target" ? 2285 return UnsignedIntTy; 2286} 2287 2288/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 2289/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 2290QualType ASTContext::getPointerDiffType() const { 2291 return getFromTargetType(Target.getPtrDiffType(0)); 2292} 2293 2294//===----------------------------------------------------------------------===// 2295// Type Operators 2296//===----------------------------------------------------------------------===// 2297 2298CanQualType ASTContext::getCanonicalParamType(QualType T) { 2299 // Push qualifiers into arrays, and then discard any remaining 2300 // qualifiers. 2301 T = getCanonicalType(T); 2302 const Type *Ty = T.getTypePtr(); 2303 2304 QualType Result; 2305 if (isa<ArrayType>(Ty)) { 2306 Result = getArrayDecayedType(QualType(Ty,0)); 2307 } else if (isa<FunctionType>(Ty)) { 2308 Result = getPointerType(QualType(Ty, 0)); 2309 } else { 2310 Result = QualType(Ty, 0); 2311 } 2312 2313 return CanQualType::CreateUnsafe(Result); 2314} 2315 2316/// getCanonicalType - Return the canonical (structural) type corresponding to 2317/// the specified potentially non-canonical type. The non-canonical version 2318/// of a type may have many "decorated" versions of types. Decorators can 2319/// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 2320/// to be free of any of these, allowing two canonical types to be compared 2321/// for exact equality with a simple pointer comparison. 2322CanQualType ASTContext::getCanonicalType(QualType T) { 2323 QualifierCollector Quals; 2324 const Type *Ptr = Quals.strip(T); 2325 QualType CanType = Ptr->getCanonicalTypeInternal(); 2326 2327 // The canonical internal type will be the canonical type *except* 2328 // that we push type qualifiers down through array types. 2329 2330 // If there are no new qualifiers to push down, stop here. 2331 if (!Quals.hasQualifiers()) 2332 return CanQualType::CreateUnsafe(CanType); 2333 2334 // If the type qualifiers are on an array type, get the canonical 2335 // type of the array with the qualifiers applied to the element 2336 // type. 2337 ArrayType *AT = dyn_cast<ArrayType>(CanType); 2338 if (!AT) 2339 return CanQualType::CreateUnsafe(getQualifiedType(CanType, Quals)); 2340 2341 // Get the canonical version of the element with the extra qualifiers on it. 2342 // This can recursively sink qualifiers through multiple levels of arrays. 2343 QualType NewEltTy = getQualifiedType(AT->getElementType(), Quals); 2344 NewEltTy = getCanonicalType(NewEltTy); 2345 2346 if (ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 2347 return CanQualType::CreateUnsafe( 2348 getConstantArrayType(NewEltTy, CAT->getSize(), 2349 CAT->getSizeModifier(), 2350 CAT->getIndexTypeCVRQualifiers())); 2351 if (IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) 2352 return CanQualType::CreateUnsafe( 2353 getIncompleteArrayType(NewEltTy, IAT->getSizeModifier(), 2354 IAT->getIndexTypeCVRQualifiers())); 2355 2356 if (DependentSizedArrayType *DSAT = dyn_cast<DependentSizedArrayType>(AT)) 2357 return CanQualType::CreateUnsafe( 2358 getDependentSizedArrayType(NewEltTy, 2359 DSAT->getSizeExpr() ? 2360 DSAT->getSizeExpr()->Retain() : 0, 2361 DSAT->getSizeModifier(), 2362 DSAT->getIndexTypeCVRQualifiers(), 2363 DSAT->getBracketsRange())->getCanonicalTypeInternal()); 2364 2365 VariableArrayType *VAT = cast<VariableArrayType>(AT); 2366 return CanQualType::CreateUnsafe(getVariableArrayType(NewEltTy, 2367 VAT->getSizeExpr() ? 2368 VAT->getSizeExpr()->Retain() : 0, 2369 VAT->getSizeModifier(), 2370 VAT->getIndexTypeCVRQualifiers(), 2371 VAT->getBracketsRange())); 2372} 2373 2374DeclarationName ASTContext::getNameForTemplate(TemplateName Name) { 2375 if (TemplateDecl *TD = Name.getAsTemplateDecl()) 2376 return TD->getDeclName(); 2377 2378 if (DependentTemplateName *DTN = Name.getAsDependentTemplateName()) { 2379 if (DTN->isIdentifier()) { 2380 return DeclarationNames.getIdentifier(DTN->getIdentifier()); 2381 } else { 2382 return DeclarationNames.getCXXOperatorName(DTN->getOperator()); 2383 } 2384 } 2385 2386 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate(); 2387 assert(Storage); 2388 return (*Storage->begin())->getDeclName(); 2389} 2390 2391TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) { 2392 // If this template name refers to a template, the canonical 2393 // template name merely stores the template itself. 2394 if (TemplateDecl *Template = Name.getAsTemplateDecl()) 2395 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 2396 2397 assert(!Name.getAsOverloadedTemplate()); 2398 2399 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 2400 assert(DTN && "Non-dependent template names must refer to template decls."); 2401 return DTN->CanonicalTemplateName; 2402} 2403 2404bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) { 2405 X = getCanonicalTemplateName(X); 2406 Y = getCanonicalTemplateName(Y); 2407 return X.getAsVoidPointer() == Y.getAsVoidPointer(); 2408} 2409 2410TemplateArgument 2411ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) { 2412 switch (Arg.getKind()) { 2413 case TemplateArgument::Null: 2414 return Arg; 2415 2416 case TemplateArgument::Expression: 2417 return Arg; 2418 2419 case TemplateArgument::Declaration: 2420 return TemplateArgument(Arg.getAsDecl()->getCanonicalDecl()); 2421 2422 case TemplateArgument::Template: 2423 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate())); 2424 2425 case TemplateArgument::Integral: 2426 return TemplateArgument(*Arg.getAsIntegral(), 2427 getCanonicalType(Arg.getIntegralType())); 2428 2429 case TemplateArgument::Type: 2430 return TemplateArgument(getCanonicalType(Arg.getAsType())); 2431 2432 case TemplateArgument::Pack: { 2433 // FIXME: Allocate in ASTContext 2434 TemplateArgument *CanonArgs = new TemplateArgument[Arg.pack_size()]; 2435 unsigned Idx = 0; 2436 for (TemplateArgument::pack_iterator A = Arg.pack_begin(), 2437 AEnd = Arg.pack_end(); 2438 A != AEnd; (void)++A, ++Idx) 2439 CanonArgs[Idx] = getCanonicalTemplateArgument(*A); 2440 2441 TemplateArgument Result; 2442 Result.setArgumentPack(CanonArgs, Arg.pack_size(), false); 2443 return Result; 2444 } 2445 } 2446 2447 // Silence GCC warning 2448 assert(false && "Unhandled template argument kind"); 2449 return TemplateArgument(); 2450} 2451 2452NestedNameSpecifier * 2453ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) { 2454 if (!NNS) 2455 return 0; 2456 2457 switch (NNS->getKind()) { 2458 case NestedNameSpecifier::Identifier: 2459 // Canonicalize the prefix but keep the identifier the same. 2460 return NestedNameSpecifier::Create(*this, 2461 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 2462 NNS->getAsIdentifier()); 2463 2464 case NestedNameSpecifier::Namespace: 2465 // A namespace is canonical; build a nested-name-specifier with 2466 // this namespace and no prefix. 2467 return NestedNameSpecifier::Create(*this, 0, NNS->getAsNamespace()); 2468 2469 case NestedNameSpecifier::TypeSpec: 2470 case NestedNameSpecifier::TypeSpecWithTemplate: { 2471 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 2472 return NestedNameSpecifier::Create(*this, 0, 2473 NNS->getKind() == NestedNameSpecifier::TypeSpecWithTemplate, 2474 T.getTypePtr()); 2475 } 2476 2477 case NestedNameSpecifier::Global: 2478 // The global specifier is canonical and unique. 2479 return NNS; 2480 } 2481 2482 // Required to silence a GCC warning 2483 return 0; 2484} 2485 2486 2487const ArrayType *ASTContext::getAsArrayType(QualType T) { 2488 // Handle the non-qualified case efficiently. 2489 if (!T.hasLocalQualifiers()) { 2490 // Handle the common positive case fast. 2491 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 2492 return AT; 2493 } 2494 2495 // Handle the common negative case fast. 2496 QualType CType = T->getCanonicalTypeInternal(); 2497 if (!isa<ArrayType>(CType)) 2498 return 0; 2499 2500 // Apply any qualifiers from the array type to the element type. This 2501 // implements C99 6.7.3p8: "If the specification of an array type includes 2502 // any type qualifiers, the element type is so qualified, not the array type." 2503 2504 // If we get here, we either have type qualifiers on the type, or we have 2505 // sugar such as a typedef in the way. If we have type qualifiers on the type 2506 // we must propagate them down into the element type. 2507 2508 QualifierCollector Qs; 2509 const Type *Ty = Qs.strip(T.getDesugaredType()); 2510 2511 // If we have a simple case, just return now. 2512 const ArrayType *ATy = dyn_cast<ArrayType>(Ty); 2513 if (ATy == 0 || Qs.empty()) 2514 return ATy; 2515 2516 // Otherwise, we have an array and we have qualifiers on it. Push the 2517 // qualifiers into the array element type and return a new array type. 2518 // Get the canonical version of the element with the extra qualifiers on it. 2519 // This can recursively sink qualifiers through multiple levels of arrays. 2520 QualType NewEltTy = getQualifiedType(ATy->getElementType(), Qs); 2521 2522 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 2523 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 2524 CAT->getSizeModifier(), 2525 CAT->getIndexTypeCVRQualifiers())); 2526 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 2527 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 2528 IAT->getSizeModifier(), 2529 IAT->getIndexTypeCVRQualifiers())); 2530 2531 if (const DependentSizedArrayType *DSAT 2532 = dyn_cast<DependentSizedArrayType>(ATy)) 2533 return cast<ArrayType>( 2534 getDependentSizedArrayType(NewEltTy, 2535 DSAT->getSizeExpr() ? 2536 DSAT->getSizeExpr()->Retain() : 0, 2537 DSAT->getSizeModifier(), 2538 DSAT->getIndexTypeCVRQualifiers(), 2539 DSAT->getBracketsRange())); 2540 2541 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 2542 return cast<ArrayType>(getVariableArrayType(NewEltTy, 2543 VAT->getSizeExpr() ? 2544 VAT->getSizeExpr()->Retain() : 0, 2545 VAT->getSizeModifier(), 2546 VAT->getIndexTypeCVRQualifiers(), 2547 VAT->getBracketsRange())); 2548} 2549 2550 2551/// getArrayDecayedType - Return the properly qualified result of decaying the 2552/// specified array type to a pointer. This operation is non-trivial when 2553/// handling typedefs etc. The canonical type of "T" must be an array type, 2554/// this returns a pointer to a properly qualified element of the array. 2555/// 2556/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 2557QualType ASTContext::getArrayDecayedType(QualType Ty) { 2558 // Get the element type with 'getAsArrayType' so that we don't lose any 2559 // typedefs in the element type of the array. This also handles propagation 2560 // of type qualifiers from the array type into the element type if present 2561 // (C99 6.7.3p8). 2562 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 2563 assert(PrettyArrayType && "Not an array type!"); 2564 2565 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 2566 2567 // int x[restrict 4] -> int *restrict 2568 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers()); 2569} 2570 2571QualType ASTContext::getBaseElementType(QualType QT) { 2572 QualifierCollector Qs; 2573 while (true) { 2574 const Type *UT = Qs.strip(QT); 2575 if (const ArrayType *AT = getAsArrayType(QualType(UT,0))) { 2576 QT = AT->getElementType(); 2577 } else { 2578 return Qs.apply(QT); 2579 } 2580 } 2581} 2582 2583QualType ASTContext::getBaseElementType(const ArrayType *AT) { 2584 QualType ElemTy = AT->getElementType(); 2585 2586 if (const ArrayType *AT = getAsArrayType(ElemTy)) 2587 return getBaseElementType(AT); 2588 2589 return ElemTy; 2590} 2591 2592/// getConstantArrayElementCount - Returns number of constant array elements. 2593uint64_t 2594ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const { 2595 uint64_t ElementCount = 1; 2596 do { 2597 ElementCount *= CA->getSize().getZExtValue(); 2598 CA = dyn_cast<ConstantArrayType>(CA->getElementType()); 2599 } while (CA); 2600 return ElementCount; 2601} 2602 2603/// getFloatingRank - Return a relative rank for floating point types. 2604/// This routine will assert if passed a built-in type that isn't a float. 2605static FloatingRank getFloatingRank(QualType T) { 2606 if (const ComplexType *CT = T->getAs<ComplexType>()) 2607 return getFloatingRank(CT->getElementType()); 2608 2609 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type"); 2610 switch (T->getAs<BuiltinType>()->getKind()) { 2611 default: assert(0 && "getFloatingRank(): not a floating type"); 2612 case BuiltinType::Float: return FloatRank; 2613 case BuiltinType::Double: return DoubleRank; 2614 case BuiltinType::LongDouble: return LongDoubleRank; 2615 } 2616} 2617 2618/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 2619/// point or a complex type (based on typeDomain/typeSize). 2620/// 'typeDomain' is a real floating point or complex type. 2621/// 'typeSize' is a real floating point or complex type. 2622QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 2623 QualType Domain) const { 2624 FloatingRank EltRank = getFloatingRank(Size); 2625 if (Domain->isComplexType()) { 2626 switch (EltRank) { 2627 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2628 case FloatRank: return FloatComplexTy; 2629 case DoubleRank: return DoubleComplexTy; 2630 case LongDoubleRank: return LongDoubleComplexTy; 2631 } 2632 } 2633 2634 assert(Domain->isRealFloatingType() && "Unknown domain!"); 2635 switch (EltRank) { 2636 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2637 case FloatRank: return FloatTy; 2638 case DoubleRank: return DoubleTy; 2639 case LongDoubleRank: return LongDoubleTy; 2640 } 2641} 2642 2643/// getFloatingTypeOrder - Compare the rank of the two specified floating 2644/// point types, ignoring the domain of the type (i.e. 'double' == 2645/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 2646/// LHS < RHS, return -1. 2647int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) { 2648 FloatingRank LHSR = getFloatingRank(LHS); 2649 FloatingRank RHSR = getFloatingRank(RHS); 2650 2651 if (LHSR == RHSR) 2652 return 0; 2653 if (LHSR > RHSR) 2654 return 1; 2655 return -1; 2656} 2657 2658/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 2659/// routine will assert if passed a built-in type that isn't an integer or enum, 2660/// or if it is not canonicalized. 2661unsigned ASTContext::getIntegerRank(Type *T) { 2662 assert(T->isCanonicalUnqualified() && "T should be canonicalized"); 2663 if (EnumType* ET = dyn_cast<EnumType>(T)) 2664 T = ET->getDecl()->getIntegerType().getTypePtr(); 2665 2666 if (T->isSpecificBuiltinType(BuiltinType::WChar)) 2667 T = getFromTargetType(Target.getWCharType()).getTypePtr(); 2668 2669 if (T->isSpecificBuiltinType(BuiltinType::Char16)) 2670 T = getFromTargetType(Target.getChar16Type()).getTypePtr(); 2671 2672 if (T->isSpecificBuiltinType(BuiltinType::Char32)) 2673 T = getFromTargetType(Target.getChar32Type()).getTypePtr(); 2674 2675 // There are two things which impact the integer rank: the width, and 2676 // the ordering of builtins. The builtin ordering is encoded in the 2677 // bottom three bits; the width is encoded in the bits above that. 2678 if (FixedWidthIntType* FWIT = dyn_cast<FixedWidthIntType>(T)) 2679 return FWIT->getWidth() << 3; 2680 2681 switch (cast<BuiltinType>(T)->getKind()) { 2682 default: assert(0 && "getIntegerRank(): not a built-in integer"); 2683 case BuiltinType::Bool: 2684 return 1 + (getIntWidth(BoolTy) << 3); 2685 case BuiltinType::Char_S: 2686 case BuiltinType::Char_U: 2687 case BuiltinType::SChar: 2688 case BuiltinType::UChar: 2689 return 2 + (getIntWidth(CharTy) << 3); 2690 case BuiltinType::Short: 2691 case BuiltinType::UShort: 2692 return 3 + (getIntWidth(ShortTy) << 3); 2693 case BuiltinType::Int: 2694 case BuiltinType::UInt: 2695 return 4 + (getIntWidth(IntTy) << 3); 2696 case BuiltinType::Long: 2697 case BuiltinType::ULong: 2698 return 5 + (getIntWidth(LongTy) << 3); 2699 case BuiltinType::LongLong: 2700 case BuiltinType::ULongLong: 2701 return 6 + (getIntWidth(LongLongTy) << 3); 2702 case BuiltinType::Int128: 2703 case BuiltinType::UInt128: 2704 return 7 + (getIntWidth(Int128Ty) << 3); 2705 } 2706} 2707 2708/// \brief Whether this is a promotable bitfield reference according 2709/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 2710/// 2711/// \returns the type this bit-field will promote to, or NULL if no 2712/// promotion occurs. 2713QualType ASTContext::isPromotableBitField(Expr *E) { 2714 FieldDecl *Field = E->getBitField(); 2715 if (!Field) 2716 return QualType(); 2717 2718 QualType FT = Field->getType(); 2719 2720 llvm::APSInt BitWidthAP = Field->getBitWidth()->EvaluateAsInt(*this); 2721 uint64_t BitWidth = BitWidthAP.getZExtValue(); 2722 uint64_t IntSize = getTypeSize(IntTy); 2723 // GCC extension compatibility: if the bit-field size is less than or equal 2724 // to the size of int, it gets promoted no matter what its type is. 2725 // For instance, unsigned long bf : 4 gets promoted to signed int. 2726 if (BitWidth < IntSize) 2727 return IntTy; 2728 2729 if (BitWidth == IntSize) 2730 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy; 2731 2732 // Types bigger than int are not subject to promotions, and therefore act 2733 // like the base type. 2734 // FIXME: This doesn't quite match what gcc does, but what gcc does here 2735 // is ridiculous. 2736 return QualType(); 2737} 2738 2739/// getPromotedIntegerType - Returns the type that Promotable will 2740/// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 2741/// integer type. 2742QualType ASTContext::getPromotedIntegerType(QualType Promotable) { 2743 assert(!Promotable.isNull()); 2744 assert(Promotable->isPromotableIntegerType()); 2745 if (Promotable->isSignedIntegerType()) 2746 return IntTy; 2747 uint64_t PromotableSize = getTypeSize(Promotable); 2748 uint64_t IntSize = getTypeSize(IntTy); 2749 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize); 2750 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy; 2751} 2752 2753/// getIntegerTypeOrder - Returns the highest ranked integer type: 2754/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 2755/// LHS < RHS, return -1. 2756int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) { 2757 Type *LHSC = getCanonicalType(LHS).getTypePtr(); 2758 Type *RHSC = getCanonicalType(RHS).getTypePtr(); 2759 if (LHSC == RHSC) return 0; 2760 2761 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 2762 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 2763 2764 unsigned LHSRank = getIntegerRank(LHSC); 2765 unsigned RHSRank = getIntegerRank(RHSC); 2766 2767 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 2768 if (LHSRank == RHSRank) return 0; 2769 return LHSRank > RHSRank ? 1 : -1; 2770 } 2771 2772 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 2773 if (LHSUnsigned) { 2774 // If the unsigned [LHS] type is larger, return it. 2775 if (LHSRank >= RHSRank) 2776 return 1; 2777 2778 // If the signed type can represent all values of the unsigned type, it 2779 // wins. Because we are dealing with 2's complement and types that are 2780 // powers of two larger than each other, this is always safe. 2781 return -1; 2782 } 2783 2784 // If the unsigned [RHS] type is larger, return it. 2785 if (RHSRank >= LHSRank) 2786 return -1; 2787 2788 // If the signed type can represent all values of the unsigned type, it 2789 // wins. Because we are dealing with 2's complement and types that are 2790 // powers of two larger than each other, this is always safe. 2791 return 1; 2792} 2793 2794static RecordDecl * 2795CreateRecordDecl(ASTContext &Ctx, RecordDecl::TagKind TK, DeclContext *DC, 2796 SourceLocation L, IdentifierInfo *Id) { 2797 if (Ctx.getLangOptions().CPlusPlus) 2798 return CXXRecordDecl::Create(Ctx, TK, DC, L, Id); 2799 else 2800 return RecordDecl::Create(Ctx, TK, DC, L, Id); 2801} 2802 2803// getCFConstantStringType - Return the type used for constant CFStrings. 2804QualType ASTContext::getCFConstantStringType() { 2805 if (!CFConstantStringTypeDecl) { 2806 CFConstantStringTypeDecl = 2807 CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2808 &Idents.get("NSConstantString")); 2809 2810 QualType FieldTypes[4]; 2811 2812 // const int *isa; 2813 FieldTypes[0] = getPointerType(IntTy.withConst()); 2814 // int flags; 2815 FieldTypes[1] = IntTy; 2816 // const char *str; 2817 FieldTypes[2] = getPointerType(CharTy.withConst()); 2818 // long length; 2819 FieldTypes[3] = LongTy; 2820 2821 // Create fields 2822 for (unsigned i = 0; i < 4; ++i) { 2823 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 2824 SourceLocation(), 0, 2825 FieldTypes[i], /*TInfo=*/0, 2826 /*BitWidth=*/0, 2827 /*Mutable=*/false); 2828 CFConstantStringTypeDecl->addDecl(Field); 2829 } 2830 2831 CFConstantStringTypeDecl->completeDefinition(*this); 2832 } 2833 2834 return getTagDeclType(CFConstantStringTypeDecl); 2835} 2836 2837void ASTContext::setCFConstantStringType(QualType T) { 2838 const RecordType *Rec = T->getAs<RecordType>(); 2839 assert(Rec && "Invalid CFConstantStringType"); 2840 CFConstantStringTypeDecl = Rec->getDecl(); 2841} 2842 2843QualType ASTContext::getObjCFastEnumerationStateType() { 2844 if (!ObjCFastEnumerationStateTypeDecl) { 2845 ObjCFastEnumerationStateTypeDecl = 2846 CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2847 &Idents.get("__objcFastEnumerationState")); 2848 2849 QualType FieldTypes[] = { 2850 UnsignedLongTy, 2851 getPointerType(ObjCIdTypedefType), 2852 getPointerType(UnsignedLongTy), 2853 getConstantArrayType(UnsignedLongTy, 2854 llvm::APInt(32, 5), ArrayType::Normal, 0) 2855 }; 2856 2857 for (size_t i = 0; i < 4; ++i) { 2858 FieldDecl *Field = FieldDecl::Create(*this, 2859 ObjCFastEnumerationStateTypeDecl, 2860 SourceLocation(), 0, 2861 FieldTypes[i], /*TInfo=*/0, 2862 /*BitWidth=*/0, 2863 /*Mutable=*/false); 2864 ObjCFastEnumerationStateTypeDecl->addDecl(Field); 2865 } 2866 2867 ObjCFastEnumerationStateTypeDecl->completeDefinition(*this); 2868 } 2869 2870 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 2871} 2872 2873QualType ASTContext::getBlockDescriptorType() { 2874 if (BlockDescriptorType) 2875 return getTagDeclType(BlockDescriptorType); 2876 2877 RecordDecl *T; 2878 // FIXME: Needs the FlagAppleBlock bit. 2879 T = CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2880 &Idents.get("__block_descriptor")); 2881 2882 QualType FieldTypes[] = { 2883 UnsignedLongTy, 2884 UnsignedLongTy, 2885 }; 2886 2887 const char *FieldNames[] = { 2888 "reserved", 2889 "Size" 2890 }; 2891 2892 for (size_t i = 0; i < 2; ++i) { 2893 FieldDecl *Field = FieldDecl::Create(*this, 2894 T, 2895 SourceLocation(), 2896 &Idents.get(FieldNames[i]), 2897 FieldTypes[i], /*TInfo=*/0, 2898 /*BitWidth=*/0, 2899 /*Mutable=*/false); 2900 T->addDecl(Field); 2901 } 2902 2903 T->completeDefinition(*this); 2904 2905 BlockDescriptorType = T; 2906 2907 return getTagDeclType(BlockDescriptorType); 2908} 2909 2910void ASTContext::setBlockDescriptorType(QualType T) { 2911 const RecordType *Rec = T->getAs<RecordType>(); 2912 assert(Rec && "Invalid BlockDescriptorType"); 2913 BlockDescriptorType = Rec->getDecl(); 2914} 2915 2916QualType ASTContext::getBlockDescriptorExtendedType() { 2917 if (BlockDescriptorExtendedType) 2918 return getTagDeclType(BlockDescriptorExtendedType); 2919 2920 RecordDecl *T; 2921 // FIXME: Needs the FlagAppleBlock bit. 2922 T = CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2923 &Idents.get("__block_descriptor_withcopydispose")); 2924 2925 QualType FieldTypes[] = { 2926 UnsignedLongTy, 2927 UnsignedLongTy, 2928 getPointerType(VoidPtrTy), 2929 getPointerType(VoidPtrTy) 2930 }; 2931 2932 const char *FieldNames[] = { 2933 "reserved", 2934 "Size", 2935 "CopyFuncPtr", 2936 "DestroyFuncPtr" 2937 }; 2938 2939 for (size_t i = 0; i < 4; ++i) { 2940 FieldDecl *Field = FieldDecl::Create(*this, 2941 T, 2942 SourceLocation(), 2943 &Idents.get(FieldNames[i]), 2944 FieldTypes[i], /*TInfo=*/0, 2945 /*BitWidth=*/0, 2946 /*Mutable=*/false); 2947 T->addDecl(Field); 2948 } 2949 2950 T->completeDefinition(*this); 2951 2952 BlockDescriptorExtendedType = T; 2953 2954 return getTagDeclType(BlockDescriptorExtendedType); 2955} 2956 2957void ASTContext::setBlockDescriptorExtendedType(QualType T) { 2958 const RecordType *Rec = T->getAs<RecordType>(); 2959 assert(Rec && "Invalid BlockDescriptorType"); 2960 BlockDescriptorExtendedType = Rec->getDecl(); 2961} 2962 2963bool ASTContext::BlockRequiresCopying(QualType Ty) { 2964 if (Ty->isBlockPointerType()) 2965 return true; 2966 if (isObjCNSObjectType(Ty)) 2967 return true; 2968 if (Ty->isObjCObjectPointerType()) 2969 return true; 2970 return false; 2971} 2972 2973QualType ASTContext::BuildByRefType(const char *DeclName, QualType Ty) { 2974 // type = struct __Block_byref_1_X { 2975 // void *__isa; 2976 // struct __Block_byref_1_X *__forwarding; 2977 // unsigned int __flags; 2978 // unsigned int __size; 2979 // void *__copy_helper; // as needed 2980 // void *__destroy_help // as needed 2981 // int X; 2982 // } * 2983 2984 bool HasCopyAndDispose = BlockRequiresCopying(Ty); 2985 2986 // FIXME: Move up 2987 static unsigned int UniqueBlockByRefTypeID = 0; 2988 llvm::SmallString<36> Name; 2989 llvm::raw_svector_ostream(Name) << "__Block_byref_" << 2990 ++UniqueBlockByRefTypeID << '_' << DeclName; 2991 RecordDecl *T; 2992 T = CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2993 &Idents.get(Name.str())); 2994 T->startDefinition(); 2995 QualType Int32Ty = IntTy; 2996 assert(getIntWidth(IntTy) == 32 && "non-32bit int not supported"); 2997 QualType FieldTypes[] = { 2998 getPointerType(VoidPtrTy), 2999 getPointerType(getTagDeclType(T)), 3000 Int32Ty, 3001 Int32Ty, 3002 getPointerType(VoidPtrTy), 3003 getPointerType(VoidPtrTy), 3004 Ty 3005 }; 3006 3007 const char *FieldNames[] = { 3008 "__isa", 3009 "__forwarding", 3010 "__flags", 3011 "__size", 3012 "__copy_helper", 3013 "__destroy_helper", 3014 DeclName, 3015 }; 3016 3017 for (size_t i = 0; i < 7; ++i) { 3018 if (!HasCopyAndDispose && i >=4 && i <= 5) 3019 continue; 3020 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3021 &Idents.get(FieldNames[i]), 3022 FieldTypes[i], /*TInfo=*/0, 3023 /*BitWidth=*/0, /*Mutable=*/false); 3024 T->addDecl(Field); 3025 } 3026 3027 T->completeDefinition(*this); 3028 3029 return getPointerType(getTagDeclType(T)); 3030} 3031 3032 3033QualType ASTContext::getBlockParmType( 3034 bool BlockHasCopyDispose, 3035 llvm::SmallVector<const Expr *, 8> &BlockDeclRefDecls) { 3036 // FIXME: Move up 3037 static unsigned int UniqueBlockParmTypeID = 0; 3038 llvm::SmallString<36> Name; 3039 llvm::raw_svector_ostream(Name) << "__block_literal_" 3040 << ++UniqueBlockParmTypeID; 3041 RecordDecl *T; 3042 T = CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 3043 &Idents.get(Name.str())); 3044 QualType FieldTypes[] = { 3045 getPointerType(VoidPtrTy), 3046 IntTy, 3047 IntTy, 3048 getPointerType(VoidPtrTy), 3049 (BlockHasCopyDispose ? 3050 getPointerType(getBlockDescriptorExtendedType()) : 3051 getPointerType(getBlockDescriptorType())) 3052 }; 3053 3054 const char *FieldNames[] = { 3055 "__isa", 3056 "__flags", 3057 "__reserved", 3058 "__FuncPtr", 3059 "__descriptor" 3060 }; 3061 3062 for (size_t i = 0; i < 5; ++i) { 3063 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3064 &Idents.get(FieldNames[i]), 3065 FieldTypes[i], /*TInfo=*/0, 3066 /*BitWidth=*/0, /*Mutable=*/false); 3067 T->addDecl(Field); 3068 } 3069 3070 for (size_t i = 0; i < BlockDeclRefDecls.size(); ++i) { 3071 const Expr *E = BlockDeclRefDecls[i]; 3072 const BlockDeclRefExpr *BDRE = dyn_cast<BlockDeclRefExpr>(E); 3073 clang::IdentifierInfo *Name = 0; 3074 if (BDRE) { 3075 const ValueDecl *D = BDRE->getDecl(); 3076 Name = &Idents.get(D->getName()); 3077 } 3078 QualType FieldType = E->getType(); 3079 3080 if (BDRE && BDRE->isByRef()) 3081 FieldType = BuildByRefType(BDRE->getDecl()->getNameAsCString(), 3082 FieldType); 3083 3084 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3085 Name, FieldType, /*TInfo=*/0, 3086 /*BitWidth=*/0, /*Mutable=*/false); 3087 T->addDecl(Field); 3088 } 3089 3090 T->completeDefinition(*this); 3091 3092 return getPointerType(getTagDeclType(T)); 3093} 3094 3095void ASTContext::setObjCFastEnumerationStateType(QualType T) { 3096 const RecordType *Rec = T->getAs<RecordType>(); 3097 assert(Rec && "Invalid ObjCFAstEnumerationStateType"); 3098 ObjCFastEnumerationStateTypeDecl = Rec->getDecl(); 3099} 3100 3101// This returns true if a type has been typedefed to BOOL: 3102// typedef <type> BOOL; 3103static bool isTypeTypedefedAsBOOL(QualType T) { 3104 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 3105 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 3106 return II->isStr("BOOL"); 3107 3108 return false; 3109} 3110 3111/// getObjCEncodingTypeSize returns size of type for objective-c encoding 3112/// purpose. 3113int ASTContext::getObjCEncodingTypeSize(QualType type) { 3114 uint64_t sz = getTypeSize(type); 3115 3116 // Make all integer and enum types at least as large as an int 3117 if (sz > 0 && type->isIntegralType()) 3118 sz = std::max(sz, getTypeSize(IntTy)); 3119 // Treat arrays as pointers, since that's how they're passed in. 3120 else if (type->isArrayType()) 3121 sz = getTypeSize(VoidPtrTy); 3122 return sz / getTypeSize(CharTy); 3123} 3124 3125/// getObjCEncodingForBlockDecl - Return the encoded type for this method 3126/// declaration. 3127void ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr, 3128 std::string& S) { 3129 const BlockDecl *Decl = Expr->getBlockDecl(); 3130 QualType BlockTy = 3131 Expr->getType()->getAs<BlockPointerType>()->getPointeeType(); 3132 // Encode result type. 3133 getObjCEncodingForType(cast<FunctionType>(BlockTy)->getResultType(), S); 3134 // Compute size of all parameters. 3135 // Start with computing size of a pointer in number of bytes. 3136 // FIXME: There might(should) be a better way of doing this computation! 3137 SourceLocation Loc; 3138 int PtrSize = getTypeSize(VoidPtrTy) / getTypeSize(CharTy); 3139 int ParmOffset = PtrSize; 3140 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3141 E = Decl->param_end(); PI != E; ++PI) { 3142 QualType PType = (*PI)->getType(); 3143 int sz = getObjCEncodingTypeSize(PType); 3144 assert (sz > 0 && "BlockExpr - Incomplete param type"); 3145 ParmOffset += sz; 3146 } 3147 // Size of the argument frame 3148 S += llvm::utostr(ParmOffset); 3149 // Block pointer and offset. 3150 S += "@?0"; 3151 ParmOffset = PtrSize; 3152 3153 // Argument types. 3154 ParmOffset = PtrSize; 3155 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E = 3156 Decl->param_end(); PI != E; ++PI) { 3157 ParmVarDecl *PVDecl = *PI; 3158 QualType PType = PVDecl->getOriginalType(); 3159 if (const ArrayType *AT = 3160 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3161 // Use array's original type only if it has known number of 3162 // elements. 3163 if (!isa<ConstantArrayType>(AT)) 3164 PType = PVDecl->getType(); 3165 } else if (PType->isFunctionType()) 3166 PType = PVDecl->getType(); 3167 getObjCEncodingForType(PType, S); 3168 S += llvm::utostr(ParmOffset); 3169 ParmOffset += getObjCEncodingTypeSize(PType); 3170 } 3171} 3172 3173/// getObjCEncodingForMethodDecl - Return the encoded type for this method 3174/// declaration. 3175void ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 3176 std::string& S) { 3177 // FIXME: This is not very efficient. 3178 // Encode type qualifer, 'in', 'inout', etc. for the return type. 3179 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S); 3180 // Encode result type. 3181 getObjCEncodingForType(Decl->getResultType(), S); 3182 // Compute size of all parameters. 3183 // Start with computing size of a pointer in number of bytes. 3184 // FIXME: There might(should) be a better way of doing this computation! 3185 SourceLocation Loc; 3186 int PtrSize = getTypeSize(VoidPtrTy) / getTypeSize(CharTy); 3187 // The first two arguments (self and _cmd) are pointers; account for 3188 // their size. 3189 int ParmOffset = 2 * PtrSize; 3190 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3191 E = Decl->param_end(); PI != E; ++PI) { 3192 QualType PType = (*PI)->getType(); 3193 int sz = getObjCEncodingTypeSize(PType); 3194 assert (sz > 0 && "getObjCEncodingForMethodDecl - Incomplete param type"); 3195 ParmOffset += sz; 3196 } 3197 S += llvm::utostr(ParmOffset); 3198 S += "@0:"; 3199 S += llvm::utostr(PtrSize); 3200 3201 // Argument types. 3202 ParmOffset = 2 * PtrSize; 3203 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3204 E = Decl->param_end(); PI != E; ++PI) { 3205 ParmVarDecl *PVDecl = *PI; 3206 QualType PType = PVDecl->getOriginalType(); 3207 if (const ArrayType *AT = 3208 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3209 // Use array's original type only if it has known number of 3210 // elements. 3211 if (!isa<ConstantArrayType>(AT)) 3212 PType = PVDecl->getType(); 3213 } else if (PType->isFunctionType()) 3214 PType = PVDecl->getType(); 3215 // Process argument qualifiers for user supplied arguments; such as, 3216 // 'in', 'inout', etc. 3217 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S); 3218 getObjCEncodingForType(PType, S); 3219 S += llvm::utostr(ParmOffset); 3220 ParmOffset += getObjCEncodingTypeSize(PType); 3221 } 3222} 3223 3224/// getObjCEncodingForPropertyDecl - Return the encoded type for this 3225/// property declaration. If non-NULL, Container must be either an 3226/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 3227/// NULL when getting encodings for protocol properties. 3228/// Property attributes are stored as a comma-delimited C string. The simple 3229/// attributes readonly and bycopy are encoded as single characters. The 3230/// parametrized attributes, getter=name, setter=name, and ivar=name, are 3231/// encoded as single characters, followed by an identifier. Property types 3232/// are also encoded as a parametrized attribute. The characters used to encode 3233/// these attributes are defined by the following enumeration: 3234/// @code 3235/// enum PropertyAttributes { 3236/// kPropertyReadOnly = 'R', // property is read-only. 3237/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 3238/// kPropertyByref = '&', // property is a reference to the value last assigned 3239/// kPropertyDynamic = 'D', // property is dynamic 3240/// kPropertyGetter = 'G', // followed by getter selector name 3241/// kPropertySetter = 'S', // followed by setter selector name 3242/// kPropertyInstanceVariable = 'V' // followed by instance variable name 3243/// kPropertyType = 't' // followed by old-style type encoding. 3244/// kPropertyWeak = 'W' // 'weak' property 3245/// kPropertyStrong = 'P' // property GC'able 3246/// kPropertyNonAtomic = 'N' // property non-atomic 3247/// }; 3248/// @endcode 3249void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 3250 const Decl *Container, 3251 std::string& S) { 3252 // Collect information from the property implementation decl(s). 3253 bool Dynamic = false; 3254 ObjCPropertyImplDecl *SynthesizePID = 0; 3255 3256 // FIXME: Duplicated code due to poor abstraction. 3257 if (Container) { 3258 if (const ObjCCategoryImplDecl *CID = 3259 dyn_cast<ObjCCategoryImplDecl>(Container)) { 3260 for (ObjCCategoryImplDecl::propimpl_iterator 3261 i = CID->propimpl_begin(), e = CID->propimpl_end(); 3262 i != e; ++i) { 3263 ObjCPropertyImplDecl *PID = *i; 3264 if (PID->getPropertyDecl() == PD) { 3265 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3266 Dynamic = true; 3267 } else { 3268 SynthesizePID = PID; 3269 } 3270 } 3271 } 3272 } else { 3273 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 3274 for (ObjCCategoryImplDecl::propimpl_iterator 3275 i = OID->propimpl_begin(), e = OID->propimpl_end(); 3276 i != e; ++i) { 3277 ObjCPropertyImplDecl *PID = *i; 3278 if (PID->getPropertyDecl() == PD) { 3279 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3280 Dynamic = true; 3281 } else { 3282 SynthesizePID = PID; 3283 } 3284 } 3285 } 3286 } 3287 } 3288 3289 // FIXME: This is not very efficient. 3290 S = "T"; 3291 3292 // Encode result type. 3293 // GCC has some special rules regarding encoding of properties which 3294 // closely resembles encoding of ivars. 3295 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 3296 true /* outermost type */, 3297 true /* encoding for property */); 3298 3299 if (PD->isReadOnly()) { 3300 S += ",R"; 3301 } else { 3302 switch (PD->getSetterKind()) { 3303 case ObjCPropertyDecl::Assign: break; 3304 case ObjCPropertyDecl::Copy: S += ",C"; break; 3305 case ObjCPropertyDecl::Retain: S += ",&"; break; 3306 } 3307 } 3308 3309 // It really isn't clear at all what this means, since properties 3310 // are "dynamic by default". 3311 if (Dynamic) 3312 S += ",D"; 3313 3314 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 3315 S += ",N"; 3316 3317 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 3318 S += ",G"; 3319 S += PD->getGetterName().getAsString(); 3320 } 3321 3322 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 3323 S += ",S"; 3324 S += PD->getSetterName().getAsString(); 3325 } 3326 3327 if (SynthesizePID) { 3328 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 3329 S += ",V"; 3330 S += OID->getNameAsString(); 3331 } 3332 3333 // FIXME: OBJCGC: weak & strong 3334} 3335 3336/// getLegacyIntegralTypeEncoding - 3337/// Another legacy compatibility encoding: 32-bit longs are encoded as 3338/// 'l' or 'L' , but not always. For typedefs, we need to use 3339/// 'i' or 'I' instead if encoding a struct field, or a pointer! 3340/// 3341void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 3342 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 3343 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) { 3344 if (BT->getKind() == BuiltinType::ULong && 3345 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3346 PointeeTy = UnsignedIntTy; 3347 else 3348 if (BT->getKind() == BuiltinType::Long && 3349 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3350 PointeeTy = IntTy; 3351 } 3352 } 3353} 3354 3355void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 3356 const FieldDecl *Field) { 3357 // We follow the behavior of gcc, expanding structures which are 3358 // directly pointed to, and expanding embedded structures. Note that 3359 // these rules are sufficient to prevent recursive encoding of the 3360 // same type. 3361 getObjCEncodingForTypeImpl(T, S, true, true, Field, 3362 true /* outermost type */); 3363} 3364 3365static void EncodeBitField(const ASTContext *Context, std::string& S, 3366 const FieldDecl *FD) { 3367 const Expr *E = FD->getBitWidth(); 3368 assert(E && "bitfield width not there - getObjCEncodingForTypeImpl"); 3369 ASTContext *Ctx = const_cast<ASTContext*>(Context); 3370 unsigned N = E->EvaluateAsInt(*Ctx).getZExtValue(); 3371 S += 'b'; 3372 S += llvm::utostr(N); 3373} 3374 3375// FIXME: Use SmallString for accumulating string. 3376void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 3377 bool ExpandPointedToStructures, 3378 bool ExpandStructures, 3379 const FieldDecl *FD, 3380 bool OutermostType, 3381 bool EncodingProperty) { 3382 if (const BuiltinType *BT = T->getAs<BuiltinType>()) { 3383 if (FD && FD->isBitField()) 3384 return EncodeBitField(this, S, FD); 3385 char encoding; 3386 switch (BT->getKind()) { 3387 default: assert(0 && "Unhandled builtin type kind"); 3388 case BuiltinType::Void: encoding = 'v'; break; 3389 case BuiltinType::Bool: encoding = 'B'; break; 3390 case BuiltinType::Char_U: 3391 case BuiltinType::UChar: encoding = 'C'; break; 3392 case BuiltinType::UShort: encoding = 'S'; break; 3393 case BuiltinType::UInt: encoding = 'I'; break; 3394 case BuiltinType::ULong: 3395 encoding = 3396 (const_cast<ASTContext *>(this))->getIntWidth(T) == 32 ? 'L' : 'Q'; 3397 break; 3398 case BuiltinType::UInt128: encoding = 'T'; break; 3399 case BuiltinType::ULongLong: encoding = 'Q'; break; 3400 case BuiltinType::Char_S: 3401 case BuiltinType::SChar: encoding = 'c'; break; 3402 case BuiltinType::Short: encoding = 's'; break; 3403 case BuiltinType::Int: encoding = 'i'; break; 3404 case BuiltinType::Long: 3405 encoding = 3406 (const_cast<ASTContext *>(this))->getIntWidth(T) == 32 ? 'l' : 'q'; 3407 break; 3408 case BuiltinType::LongLong: encoding = 'q'; break; 3409 case BuiltinType::Int128: encoding = 't'; break; 3410 case BuiltinType::Float: encoding = 'f'; break; 3411 case BuiltinType::Double: encoding = 'd'; break; 3412 case BuiltinType::LongDouble: encoding = 'd'; break; 3413 } 3414 3415 S += encoding; 3416 return; 3417 } 3418 3419 if (const ComplexType *CT = T->getAs<ComplexType>()) { 3420 S += 'j'; 3421 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 3422 false); 3423 return; 3424 } 3425 3426 if (const PointerType *PT = T->getAs<PointerType>()) { 3427 if (PT->isObjCSelType()) { 3428 S += ':'; 3429 return; 3430 } 3431 QualType PointeeTy = PT->getPointeeType(); 3432 3433 bool isReadOnly = false; 3434 // For historical/compatibility reasons, the read-only qualifier of the 3435 // pointee gets emitted _before_ the '^'. The read-only qualifier of 3436 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 3437 // Also, do not emit the 'r' for anything but the outermost type! 3438 if (isa<TypedefType>(T.getTypePtr())) { 3439 if (OutermostType && T.isConstQualified()) { 3440 isReadOnly = true; 3441 S += 'r'; 3442 } 3443 } else if (OutermostType) { 3444 QualType P = PointeeTy; 3445 while (P->getAs<PointerType>()) 3446 P = P->getAs<PointerType>()->getPointeeType(); 3447 if (P.isConstQualified()) { 3448 isReadOnly = true; 3449 S += 'r'; 3450 } 3451 } 3452 if (isReadOnly) { 3453 // Another legacy compatibility encoding. Some ObjC qualifier and type 3454 // combinations need to be rearranged. 3455 // Rewrite "in const" from "nr" to "rn" 3456 const char * s = S.c_str(); 3457 int len = S.length(); 3458 if (len >= 2 && s[len-2] == 'n' && s[len-1] == 'r') { 3459 std::string replace = "rn"; 3460 S.replace(S.end()-2, S.end(), replace); 3461 } 3462 } 3463 3464 if (PointeeTy->isCharType()) { 3465 // char pointer types should be encoded as '*' unless it is a 3466 // type that has been typedef'd to 'BOOL'. 3467 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 3468 S += '*'; 3469 return; 3470 } 3471 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) { 3472 // GCC binary compat: Need to convert "struct objc_class *" to "#". 3473 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 3474 S += '#'; 3475 return; 3476 } 3477 // GCC binary compat: Need to convert "struct objc_object *" to "@". 3478 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 3479 S += '@'; 3480 return; 3481 } 3482 // fall through... 3483 } 3484 S += '^'; 3485 getLegacyIntegralTypeEncoding(PointeeTy); 3486 3487 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 3488 NULL); 3489 return; 3490 } 3491 3492 if (const ArrayType *AT = 3493 // Ignore type qualifiers etc. 3494 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 3495 if (isa<IncompleteArrayType>(AT)) { 3496 // Incomplete arrays are encoded as a pointer to the array element. 3497 S += '^'; 3498 3499 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3500 false, ExpandStructures, FD); 3501 } else { 3502 S += '['; 3503 3504 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 3505 S += llvm::utostr(CAT->getSize().getZExtValue()); 3506 else { 3507 //Variable length arrays are encoded as a regular array with 0 elements. 3508 assert(isa<VariableArrayType>(AT) && "Unknown array type!"); 3509 S += '0'; 3510 } 3511 3512 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3513 false, ExpandStructures, FD); 3514 S += ']'; 3515 } 3516 return; 3517 } 3518 3519 if (T->getAs<FunctionType>()) { 3520 S += '?'; 3521 return; 3522 } 3523 3524 if (const RecordType *RTy = T->getAs<RecordType>()) { 3525 RecordDecl *RDecl = RTy->getDecl(); 3526 S += RDecl->isUnion() ? '(' : '{'; 3527 // Anonymous structures print as '?' 3528 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 3529 S += II->getName(); 3530 } else { 3531 S += '?'; 3532 } 3533 if (ExpandStructures) { 3534 S += '='; 3535 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 3536 FieldEnd = RDecl->field_end(); 3537 Field != FieldEnd; ++Field) { 3538 if (FD) { 3539 S += '"'; 3540 S += Field->getNameAsString(); 3541 S += '"'; 3542 } 3543 3544 // Special case bit-fields. 3545 if (Field->isBitField()) { 3546 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 3547 (*Field)); 3548 } else { 3549 QualType qt = Field->getType(); 3550 getLegacyIntegralTypeEncoding(qt); 3551 getObjCEncodingForTypeImpl(qt, S, false, true, 3552 FD); 3553 } 3554 } 3555 } 3556 S += RDecl->isUnion() ? ')' : '}'; 3557 return; 3558 } 3559 3560 if (T->isEnumeralType()) { 3561 if (FD && FD->isBitField()) 3562 EncodeBitField(this, S, FD); 3563 else 3564 S += 'i'; 3565 return; 3566 } 3567 3568 if (T->isBlockPointerType()) { 3569 S += "@?"; // Unlike a pointer-to-function, which is "^?". 3570 return; 3571 } 3572 3573 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) { 3574 // @encode(class_name) 3575 ObjCInterfaceDecl *OI = OIT->getDecl(); 3576 S += '{'; 3577 const IdentifierInfo *II = OI->getIdentifier(); 3578 S += II->getName(); 3579 S += '='; 3580 llvm::SmallVector<FieldDecl*, 32> RecFields; 3581 CollectObjCIvars(OI, RecFields); 3582 for (unsigned i = 0, e = RecFields.size(); i != e; ++i) { 3583 if (RecFields[i]->isBitField()) 3584 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3585 RecFields[i]); 3586 else 3587 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3588 FD); 3589 } 3590 S += '}'; 3591 return; 3592 } 3593 3594 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) { 3595 if (OPT->isObjCIdType()) { 3596 S += '@'; 3597 return; 3598 } 3599 3600 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) { 3601 // FIXME: Consider if we need to output qualifiers for 'Class<p>'. 3602 // Since this is a binary compatibility issue, need to consult with runtime 3603 // folks. Fortunately, this is a *very* obsure construct. 3604 S += '#'; 3605 return; 3606 } 3607 3608 if (OPT->isObjCQualifiedIdType()) { 3609 getObjCEncodingForTypeImpl(getObjCIdType(), S, 3610 ExpandPointedToStructures, 3611 ExpandStructures, FD); 3612 if (FD || EncodingProperty) { 3613 // Note that we do extended encoding of protocol qualifer list 3614 // Only when doing ivar or property encoding. 3615 S += '"'; 3616 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3617 E = OPT->qual_end(); I != E; ++I) { 3618 S += '<'; 3619 S += (*I)->getNameAsString(); 3620 S += '>'; 3621 } 3622 S += '"'; 3623 } 3624 return; 3625 } 3626 3627 QualType PointeeTy = OPT->getPointeeType(); 3628 if (!EncodingProperty && 3629 isa<TypedefType>(PointeeTy.getTypePtr())) { 3630 // Another historical/compatibility reason. 3631 // We encode the underlying type which comes out as 3632 // {...}; 3633 S += '^'; 3634 getObjCEncodingForTypeImpl(PointeeTy, S, 3635 false, ExpandPointedToStructures, 3636 NULL); 3637 return; 3638 } 3639 3640 S += '@'; 3641 if (OPT->getInterfaceDecl() && (FD || EncodingProperty)) { 3642 S += '"'; 3643 S += OPT->getInterfaceDecl()->getIdentifier()->getName(); 3644 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3645 E = OPT->qual_end(); I != E; ++I) { 3646 S += '<'; 3647 S += (*I)->getNameAsString(); 3648 S += '>'; 3649 } 3650 S += '"'; 3651 } 3652 return; 3653 } 3654 3655 assert(0 && "@encode for type not implemented!"); 3656} 3657 3658void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 3659 std::string& S) const { 3660 if (QT & Decl::OBJC_TQ_In) 3661 S += 'n'; 3662 if (QT & Decl::OBJC_TQ_Inout) 3663 S += 'N'; 3664 if (QT & Decl::OBJC_TQ_Out) 3665 S += 'o'; 3666 if (QT & Decl::OBJC_TQ_Bycopy) 3667 S += 'O'; 3668 if (QT & Decl::OBJC_TQ_Byref) 3669 S += 'R'; 3670 if (QT & Decl::OBJC_TQ_Oneway) 3671 S += 'V'; 3672} 3673 3674void ASTContext::setBuiltinVaListType(QualType T) { 3675 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 3676 3677 BuiltinVaListType = T; 3678} 3679 3680void ASTContext::setObjCIdType(QualType T) { 3681 ObjCIdTypedefType = T; 3682} 3683 3684void ASTContext::setObjCSelType(QualType T) { 3685 ObjCSelTypedefType = T; 3686} 3687 3688void ASTContext::setObjCProtoType(QualType QT) { 3689 ObjCProtoType = QT; 3690} 3691 3692void ASTContext::setObjCClassType(QualType T) { 3693 ObjCClassTypedefType = T; 3694} 3695 3696void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 3697 assert(ObjCConstantStringType.isNull() && 3698 "'NSConstantString' type already set!"); 3699 3700 ObjCConstantStringType = getObjCInterfaceType(Decl); 3701} 3702 3703/// \brief Retrieve the template name that corresponds to a non-empty 3704/// lookup. 3705TemplateName ASTContext::getOverloadedTemplateName(NamedDecl * const *Begin, 3706 NamedDecl * const *End) { 3707 unsigned size = End - Begin; 3708 assert(size > 1 && "set is not overloaded!"); 3709 3710 void *memory = Allocate(sizeof(OverloadedTemplateStorage) + 3711 size * sizeof(FunctionTemplateDecl*)); 3712 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size); 3713 3714 NamedDecl **Storage = OT->getStorage(); 3715 for (NamedDecl * const *I = Begin; I != End; ++I) { 3716 NamedDecl *D = *I; 3717 assert(isa<FunctionTemplateDecl>(D) || 3718 (isa<UsingShadowDecl>(D) && 3719 isa<FunctionTemplateDecl>(D->getUnderlyingDecl()))); 3720 *Storage++ = D; 3721 } 3722 3723 return TemplateName(OT); 3724} 3725 3726/// \brief Retrieve the template name that represents a qualified 3727/// template name such as \c std::vector. 3728TemplateName ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 3729 bool TemplateKeyword, 3730 TemplateDecl *Template) { 3731 llvm::FoldingSetNodeID ID; 3732 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 3733 3734 void *InsertPos = 0; 3735 QualifiedTemplateName *QTN = 3736 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3737 if (!QTN) { 3738 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 3739 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 3740 } 3741 3742 return TemplateName(QTN); 3743} 3744 3745/// \brief Retrieve the template name that represents a dependent 3746/// template name such as \c MetaFun::template apply. 3747TemplateName ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 3748 const IdentifierInfo *Name) { 3749 assert((!NNS || NNS->isDependent()) && 3750 "Nested name specifier must be dependent"); 3751 3752 llvm::FoldingSetNodeID ID; 3753 DependentTemplateName::Profile(ID, NNS, Name); 3754 3755 void *InsertPos = 0; 3756 DependentTemplateName *QTN = 3757 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3758 3759 if (QTN) 3760 return TemplateName(QTN); 3761 3762 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 3763 if (CanonNNS == NNS) { 3764 QTN = new (*this,4) DependentTemplateName(NNS, Name); 3765 } else { 3766 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 3767 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 3768 } 3769 3770 DependentTemplateNames.InsertNode(QTN, InsertPos); 3771 return TemplateName(QTN); 3772} 3773 3774/// \brief Retrieve the template name that represents a dependent 3775/// template name such as \c MetaFun::template operator+. 3776TemplateName 3777ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 3778 OverloadedOperatorKind Operator) { 3779 assert((!NNS || NNS->isDependent()) && 3780 "Nested name specifier must be dependent"); 3781 3782 llvm::FoldingSetNodeID ID; 3783 DependentTemplateName::Profile(ID, NNS, Operator); 3784 3785 void *InsertPos = 0; 3786 DependentTemplateName *QTN = 3787 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3788 3789 if (QTN) 3790 return TemplateName(QTN); 3791 3792 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 3793 if (CanonNNS == NNS) { 3794 QTN = new (*this,4) DependentTemplateName(NNS, Operator); 3795 } else { 3796 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator); 3797 QTN = new (*this,4) DependentTemplateName(NNS, Operator, Canon); 3798 } 3799 3800 DependentTemplateNames.InsertNode(QTN, InsertPos); 3801 return TemplateName(QTN); 3802} 3803 3804/// getFromTargetType - Given one of the integer types provided by 3805/// TargetInfo, produce the corresponding type. The unsigned @p Type 3806/// is actually a value of type @c TargetInfo::IntType. 3807CanQualType ASTContext::getFromTargetType(unsigned Type) const { 3808 switch (Type) { 3809 case TargetInfo::NoInt: return CanQualType(); 3810 case TargetInfo::SignedShort: return ShortTy; 3811 case TargetInfo::UnsignedShort: return UnsignedShortTy; 3812 case TargetInfo::SignedInt: return IntTy; 3813 case TargetInfo::UnsignedInt: return UnsignedIntTy; 3814 case TargetInfo::SignedLong: return LongTy; 3815 case TargetInfo::UnsignedLong: return UnsignedLongTy; 3816 case TargetInfo::SignedLongLong: return LongLongTy; 3817 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 3818 } 3819 3820 assert(false && "Unhandled TargetInfo::IntType value"); 3821 return CanQualType(); 3822} 3823 3824//===----------------------------------------------------------------------===// 3825// Type Predicates. 3826//===----------------------------------------------------------------------===// 3827 3828/// isObjCNSObjectType - Return true if this is an NSObject object using 3829/// NSObject attribute on a c-style pointer type. 3830/// FIXME - Make it work directly on types. 3831/// FIXME: Move to Type. 3832/// 3833bool ASTContext::isObjCNSObjectType(QualType Ty) const { 3834 if (TypedefType *TDT = dyn_cast<TypedefType>(Ty)) { 3835 if (TypedefDecl *TD = TDT->getDecl()) 3836 if (TD->getAttr<ObjCNSObjectAttr>()) 3837 return true; 3838 } 3839 return false; 3840} 3841 3842/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 3843/// garbage collection attribute. 3844/// 3845Qualifiers::GC ASTContext::getObjCGCAttrKind(const QualType &Ty) const { 3846 Qualifiers::GC GCAttrs = Qualifiers::GCNone; 3847 if (getLangOptions().ObjC1 && 3848 getLangOptions().getGCMode() != LangOptions::NonGC) { 3849 GCAttrs = Ty.getObjCGCAttr(); 3850 // Default behavious under objective-c's gc is for objective-c pointers 3851 // (or pointers to them) be treated as though they were declared 3852 // as __strong. 3853 if (GCAttrs == Qualifiers::GCNone) { 3854 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 3855 GCAttrs = Qualifiers::Strong; 3856 else if (Ty->isPointerType()) 3857 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType()); 3858 } 3859 // Non-pointers have none gc'able attribute regardless of the attribute 3860 // set on them. 3861 else if (!Ty->isAnyPointerType() && !Ty->isBlockPointerType()) 3862 return Qualifiers::GCNone; 3863 } 3864 return GCAttrs; 3865} 3866 3867//===----------------------------------------------------------------------===// 3868// Type Compatibility Testing 3869//===----------------------------------------------------------------------===// 3870 3871/// areCompatVectorTypes - Return true if the two specified vector types are 3872/// compatible. 3873static bool areCompatVectorTypes(const VectorType *LHS, 3874 const VectorType *RHS) { 3875 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified()); 3876 return LHS->getElementType() == RHS->getElementType() && 3877 LHS->getNumElements() == RHS->getNumElements(); 3878} 3879 3880//===----------------------------------------------------------------------===// 3881// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 3882//===----------------------------------------------------------------------===// 3883 3884/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 3885/// inheritance hierarchy of 'rProto'. 3886bool ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 3887 ObjCProtocolDecl *rProto) { 3888 if (lProto == rProto) 3889 return true; 3890 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 3891 E = rProto->protocol_end(); PI != E; ++PI) 3892 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 3893 return true; 3894 return false; 3895} 3896 3897/// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...> 3898/// return true if lhs's protocols conform to rhs's protocol; false 3899/// otherwise. 3900bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 3901 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 3902 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 3903 return false; 3904} 3905 3906/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 3907/// ObjCQualifiedIDType. 3908bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 3909 bool compare) { 3910 // Allow id<P..> and an 'id' or void* type in all cases. 3911 if (lhs->isVoidPointerType() || 3912 lhs->isObjCIdType() || lhs->isObjCClassType()) 3913 return true; 3914 else if (rhs->isVoidPointerType() || 3915 rhs->isObjCIdType() || rhs->isObjCClassType()) 3916 return true; 3917 3918 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 3919 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 3920 3921 if (!rhsOPT) return false; 3922 3923 if (rhsOPT->qual_empty()) { 3924 // If the RHS is a unqualified interface pointer "NSString*", 3925 // make sure we check the class hierarchy. 3926 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 3927 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 3928 E = lhsQID->qual_end(); I != E; ++I) { 3929 // when comparing an id<P> on lhs with a static type on rhs, 3930 // see if static class implements all of id's protocols, directly or 3931 // through its super class and categories. 3932 if (!rhsID->ClassImplementsProtocol(*I, true)) 3933 return false; 3934 } 3935 } 3936 // If there are no qualifiers and no interface, we have an 'id'. 3937 return true; 3938 } 3939 // Both the right and left sides have qualifiers. 3940 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 3941 E = lhsQID->qual_end(); I != E; ++I) { 3942 ObjCProtocolDecl *lhsProto = *I; 3943 bool match = false; 3944 3945 // when comparing an id<P> on lhs with a static type on rhs, 3946 // see if static class implements all of id's protocols, directly or 3947 // through its super class and categories. 3948 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 3949 E = rhsOPT->qual_end(); J != E; ++J) { 3950 ObjCProtocolDecl *rhsProto = *J; 3951 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 3952 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 3953 match = true; 3954 break; 3955 } 3956 } 3957 // If the RHS is a qualified interface pointer "NSString<P>*", 3958 // make sure we check the class hierarchy. 3959 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 3960 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 3961 E = lhsQID->qual_end(); I != E; ++I) { 3962 // when comparing an id<P> on lhs with a static type on rhs, 3963 // see if static class implements all of id's protocols, directly or 3964 // through its super class and categories. 3965 if (rhsID->ClassImplementsProtocol(*I, true)) { 3966 match = true; 3967 break; 3968 } 3969 } 3970 } 3971 if (!match) 3972 return false; 3973 } 3974 3975 return true; 3976 } 3977 3978 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 3979 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 3980 3981 if (const ObjCObjectPointerType *lhsOPT = 3982 lhs->getAsObjCInterfacePointerType()) { 3983 if (lhsOPT->qual_empty()) { 3984 bool match = false; 3985 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 3986 for (ObjCObjectPointerType::qual_iterator I = rhsQID->qual_begin(), 3987 E = rhsQID->qual_end(); I != E; ++I) { 3988 // when comparing an id<P> on lhs with a static type on rhs, 3989 // see if static class implements all of id's protocols, directly or 3990 // through its super class and categories. 3991 if (lhsID->ClassImplementsProtocol(*I, true)) { 3992 match = true; 3993 break; 3994 } 3995 } 3996 if (!match) 3997 return false; 3998 } 3999 return true; 4000 } 4001 // Both the right and left sides have qualifiers. 4002 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 4003 E = lhsOPT->qual_end(); I != E; ++I) { 4004 ObjCProtocolDecl *lhsProto = *I; 4005 bool match = false; 4006 4007 // when comparing an id<P> on lhs with a static type on rhs, 4008 // see if static class implements all of id's protocols, directly or 4009 // through its super class and categories. 4010 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 4011 E = rhsQID->qual_end(); J != E; ++J) { 4012 ObjCProtocolDecl *rhsProto = *J; 4013 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4014 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4015 match = true; 4016 break; 4017 } 4018 } 4019 if (!match) 4020 return false; 4021 } 4022 return true; 4023 } 4024 return false; 4025} 4026 4027/// canAssignObjCInterfaces - Return true if the two interface types are 4028/// compatible for assignment from RHS to LHS. This handles validation of any 4029/// protocol qualifiers on the LHS or RHS. 4030/// 4031bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 4032 const ObjCObjectPointerType *RHSOPT) { 4033 // If either type represents the built-in 'id' or 'Class' types, return true. 4034 if (LHSOPT->isObjCBuiltinType() || RHSOPT->isObjCBuiltinType()) 4035 return true; 4036 4037 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 4038 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4039 QualType(RHSOPT,0), 4040 false); 4041 4042 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4043 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4044 if (LHS && RHS) // We have 2 user-defined types. 4045 return canAssignObjCInterfaces(LHS, RHS); 4046 4047 return false; 4048} 4049 4050/// getIntersectionOfProtocols - This routine finds the intersection of set 4051/// of protocols inherited from two distinct objective-c pointer objects. 4052/// It is used to build composite qualifier list of the composite type of 4053/// the conditional expression involving two objective-c pointer objects. 4054static 4055void getIntersectionOfProtocols(ASTContext &Context, 4056 const ObjCObjectPointerType *LHSOPT, 4057 const ObjCObjectPointerType *RHSOPT, 4058 llvm::SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) { 4059 4060 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4061 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4062 4063 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet; 4064 unsigned LHSNumProtocols = LHS->getNumProtocols(); 4065 if (LHSNumProtocols > 0) 4066 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end()); 4067 else { 4068 llvm::SmallVector<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 4069 Context.CollectInheritedProtocols(LHS->getDecl(), LHSInheritedProtocols); 4070 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(), 4071 LHSInheritedProtocols.end()); 4072 } 4073 4074 unsigned RHSNumProtocols = RHS->getNumProtocols(); 4075 if (RHSNumProtocols > 0) { 4076 ObjCProtocolDecl **RHSProtocols = (ObjCProtocolDecl **)RHS->qual_begin(); 4077 for (unsigned i = 0; i < RHSNumProtocols; ++i) 4078 if (InheritedProtocolSet.count(RHSProtocols[i])) 4079 IntersectionOfProtocols.push_back(RHSProtocols[i]); 4080 } 4081 else { 4082 llvm::SmallVector<ObjCProtocolDecl *, 8> RHSInheritedProtocols; 4083 Context.CollectInheritedProtocols(RHS->getDecl(), RHSInheritedProtocols); 4084 // FIXME. This may cause duplication of protocols in the list, but should 4085 // be harmless. 4086 for (unsigned i = 0, len = RHSInheritedProtocols.size(); i < len; ++i) 4087 if (InheritedProtocolSet.count(RHSInheritedProtocols[i])) 4088 IntersectionOfProtocols.push_back(RHSInheritedProtocols[i]); 4089 } 4090} 4091 4092/// areCommonBaseCompatible - Returns common base class of the two classes if 4093/// one found. Note that this is O'2 algorithm. But it will be called as the 4094/// last type comparison in a ?-exp of ObjC pointer types before a 4095/// warning is issued. So, its invokation is extremely rare. 4096QualType ASTContext::areCommonBaseCompatible( 4097 const ObjCObjectPointerType *LHSOPT, 4098 const ObjCObjectPointerType *RHSOPT) { 4099 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4100 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4101 if (!LHS || !RHS) 4102 return QualType(); 4103 4104 while (const ObjCInterfaceDecl *LHSIDecl = LHS->getDecl()->getSuperClass()) { 4105 QualType LHSTy = getObjCInterfaceType(LHSIDecl); 4106 LHS = LHSTy->getAs<ObjCInterfaceType>(); 4107 if (canAssignObjCInterfaces(LHS, RHS)) { 4108 llvm::SmallVector<ObjCProtocolDecl *, 8> IntersectionOfProtocols; 4109 getIntersectionOfProtocols(*this, 4110 LHSOPT, RHSOPT, IntersectionOfProtocols); 4111 if (IntersectionOfProtocols.empty()) 4112 LHSTy = getObjCObjectPointerType(LHSTy); 4113 else 4114 LHSTy = getObjCObjectPointerType(LHSTy, &IntersectionOfProtocols[0], 4115 IntersectionOfProtocols.size()); 4116 return LHSTy; 4117 } 4118 } 4119 4120 return QualType(); 4121} 4122 4123bool ASTContext::canAssignObjCInterfaces(const ObjCInterfaceType *LHS, 4124 const ObjCInterfaceType *RHS) { 4125 // Verify that the base decls are compatible: the RHS must be a subclass of 4126 // the LHS. 4127 if (!LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 4128 return false; 4129 4130 // RHS must have a superset of the protocols in the LHS. If the LHS is not 4131 // protocol qualified at all, then we are good. 4132 if (LHS->getNumProtocols() == 0) 4133 return true; 4134 4135 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, then it 4136 // isn't a superset. 4137 if (RHS->getNumProtocols() == 0) 4138 return true; // FIXME: should return false! 4139 4140 for (ObjCInterfaceType::qual_iterator LHSPI = LHS->qual_begin(), 4141 LHSPE = LHS->qual_end(); 4142 LHSPI != LHSPE; LHSPI++) { 4143 bool RHSImplementsProtocol = false; 4144 4145 // If the RHS doesn't implement the protocol on the left, the types 4146 // are incompatible. 4147 for (ObjCInterfaceType::qual_iterator RHSPI = RHS->qual_begin(), 4148 RHSPE = RHS->qual_end(); 4149 RHSPI != RHSPE; RHSPI++) { 4150 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 4151 RHSImplementsProtocol = true; 4152 break; 4153 } 4154 } 4155 // FIXME: For better diagnostics, consider passing back the protocol name. 4156 if (!RHSImplementsProtocol) 4157 return false; 4158 } 4159 // The RHS implements all protocols listed on the LHS. 4160 return true; 4161} 4162 4163bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 4164 // get the "pointed to" types 4165 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>(); 4166 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>(); 4167 4168 if (!LHSOPT || !RHSOPT) 4169 return false; 4170 4171 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 4172 canAssignObjCInterfaces(RHSOPT, LHSOPT); 4173} 4174 4175/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 4176/// both shall have the identically qualified version of a compatible type. 4177/// C99 6.2.7p1: Two types have compatible types if their types are the 4178/// same. See 6.7.[2,3,5] for additional rules. 4179bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS) { 4180 return !mergeTypes(LHS, RHS).isNull(); 4181} 4182 4183QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs) { 4184 const FunctionType *lbase = lhs->getAs<FunctionType>(); 4185 const FunctionType *rbase = rhs->getAs<FunctionType>(); 4186 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 4187 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 4188 bool allLTypes = true; 4189 bool allRTypes = true; 4190 4191 // Check return type 4192 QualType retType = mergeTypes(lbase->getResultType(), rbase->getResultType()); 4193 if (retType.isNull()) return QualType(); 4194 if (getCanonicalType(retType) != getCanonicalType(lbase->getResultType())) 4195 allLTypes = false; 4196 if (getCanonicalType(retType) != getCanonicalType(rbase->getResultType())) 4197 allRTypes = false; 4198 // FIXME: double check this 4199 bool NoReturn = lbase->getNoReturnAttr() || rbase->getNoReturnAttr(); 4200 if (NoReturn != lbase->getNoReturnAttr()) 4201 allLTypes = false; 4202 if (NoReturn != rbase->getNoReturnAttr()) 4203 allRTypes = false; 4204 4205 if (lproto && rproto) { // two C99 style function prototypes 4206 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 4207 "C++ shouldn't be here"); 4208 unsigned lproto_nargs = lproto->getNumArgs(); 4209 unsigned rproto_nargs = rproto->getNumArgs(); 4210 4211 // Compatible functions must have the same number of arguments 4212 if (lproto_nargs != rproto_nargs) 4213 return QualType(); 4214 4215 // Variadic and non-variadic functions aren't compatible 4216 if (lproto->isVariadic() != rproto->isVariadic()) 4217 return QualType(); 4218 4219 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 4220 return QualType(); 4221 4222 // Check argument compatibility 4223 llvm::SmallVector<QualType, 10> types; 4224 for (unsigned i = 0; i < lproto_nargs; i++) { 4225 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 4226 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 4227 QualType argtype = mergeTypes(largtype, rargtype); 4228 if (argtype.isNull()) return QualType(); 4229 types.push_back(argtype); 4230 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 4231 allLTypes = false; 4232 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 4233 allRTypes = false; 4234 } 4235 if (allLTypes) return lhs; 4236 if (allRTypes) return rhs; 4237 return getFunctionType(retType, types.begin(), types.size(), 4238 lproto->isVariadic(), lproto->getTypeQuals(), 4239 NoReturn); 4240 } 4241 4242 if (lproto) allRTypes = false; 4243 if (rproto) allLTypes = false; 4244 4245 const FunctionProtoType *proto = lproto ? lproto : rproto; 4246 if (proto) { 4247 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 4248 if (proto->isVariadic()) return QualType(); 4249 // Check that the types are compatible with the types that 4250 // would result from default argument promotions (C99 6.7.5.3p15). 4251 // The only types actually affected are promotable integer 4252 // types and floats, which would be passed as a different 4253 // type depending on whether the prototype is visible. 4254 unsigned proto_nargs = proto->getNumArgs(); 4255 for (unsigned i = 0; i < proto_nargs; ++i) { 4256 QualType argTy = proto->getArgType(i); 4257 if (argTy->isPromotableIntegerType() || 4258 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 4259 return QualType(); 4260 } 4261 4262 if (allLTypes) return lhs; 4263 if (allRTypes) return rhs; 4264 return getFunctionType(retType, proto->arg_type_begin(), 4265 proto->getNumArgs(), proto->isVariadic(), 4266 proto->getTypeQuals(), NoReturn); 4267 } 4268 4269 if (allLTypes) return lhs; 4270 if (allRTypes) return rhs; 4271 return getFunctionNoProtoType(retType, NoReturn); 4272} 4273 4274QualType ASTContext::mergeTypes(QualType LHS, QualType RHS) { 4275 // C++ [expr]: If an expression initially has the type "reference to T", the 4276 // type is adjusted to "T" prior to any further analysis, the expression 4277 // designates the object or function denoted by the reference, and the 4278 // expression is an lvalue unless the reference is an rvalue reference and 4279 // the expression is a function call (possibly inside parentheses). 4280 // FIXME: C++ shouldn't be going through here! The rules are different 4281 // enough that they should be handled separately. 4282 // FIXME: Merging of lvalue and rvalue references is incorrect. C++ *really* 4283 // shouldn't be going through here! 4284 if (const ReferenceType *RT = LHS->getAs<ReferenceType>()) 4285 LHS = RT->getPointeeType(); 4286 if (const ReferenceType *RT = RHS->getAs<ReferenceType>()) 4287 RHS = RT->getPointeeType(); 4288 4289 QualType LHSCan = getCanonicalType(LHS), 4290 RHSCan = getCanonicalType(RHS); 4291 4292 // If two types are identical, they are compatible. 4293 if (LHSCan == RHSCan) 4294 return LHS; 4295 4296 // If the qualifiers are different, the types aren't compatible... mostly. 4297 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 4298 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 4299 if (LQuals != RQuals) { 4300 // If any of these qualifiers are different, we have a type 4301 // mismatch. 4302 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 4303 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 4304 return QualType(); 4305 4306 // Exactly one GC qualifier difference is allowed: __strong is 4307 // okay if the other type has no GC qualifier but is an Objective 4308 // C object pointer (i.e. implicitly strong by default). We fix 4309 // this by pretending that the unqualified type was actually 4310 // qualified __strong. 4311 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 4312 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 4313 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 4314 4315 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 4316 return QualType(); 4317 4318 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) { 4319 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong)); 4320 } 4321 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) { 4322 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS); 4323 } 4324 return QualType(); 4325 } 4326 4327 // Okay, qualifiers are equal. 4328 4329 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 4330 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 4331 4332 // We want to consider the two function types to be the same for these 4333 // comparisons, just force one to the other. 4334 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 4335 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 4336 4337 // Same as above for arrays 4338 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 4339 LHSClass = Type::ConstantArray; 4340 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 4341 RHSClass = Type::ConstantArray; 4342 4343 // Canonicalize ExtVector -> Vector. 4344 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 4345 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 4346 4347 // If the canonical type classes don't match. 4348 if (LHSClass != RHSClass) { 4349 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 4350 // a signed integer type, or an unsigned integer type. 4351 if (const EnumType* ETy = LHS->getAs<EnumType>()) { 4352 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 4353 return RHS; 4354 } 4355 if (const EnumType* ETy = RHS->getAs<EnumType>()) { 4356 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 4357 return LHS; 4358 } 4359 4360 return QualType(); 4361 } 4362 4363 // The canonical type classes match. 4364 switch (LHSClass) { 4365#define TYPE(Class, Base) 4366#define ABSTRACT_TYPE(Class, Base) 4367#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 4368#define DEPENDENT_TYPE(Class, Base) case Type::Class: 4369#include "clang/AST/TypeNodes.def" 4370 assert(false && "Non-canonical and dependent types shouldn't get here"); 4371 return QualType(); 4372 4373 case Type::LValueReference: 4374 case Type::RValueReference: 4375 case Type::MemberPointer: 4376 assert(false && "C++ should never be in mergeTypes"); 4377 return QualType(); 4378 4379 case Type::IncompleteArray: 4380 case Type::VariableArray: 4381 case Type::FunctionProto: 4382 case Type::ExtVector: 4383 assert(false && "Types are eliminated above"); 4384 return QualType(); 4385 4386 case Type::Pointer: 4387 { 4388 // Merge two pointer types, while trying to preserve typedef info 4389 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType(); 4390 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType(); 4391 QualType ResultType = mergeTypes(LHSPointee, RHSPointee); 4392 if (ResultType.isNull()) return QualType(); 4393 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4394 return LHS; 4395 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4396 return RHS; 4397 return getPointerType(ResultType); 4398 } 4399 case Type::BlockPointer: 4400 { 4401 // Merge two block pointer types, while trying to preserve typedef info 4402 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType(); 4403 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType(); 4404 QualType ResultType = mergeTypes(LHSPointee, RHSPointee); 4405 if (ResultType.isNull()) return QualType(); 4406 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4407 return LHS; 4408 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4409 return RHS; 4410 return getBlockPointerType(ResultType); 4411 } 4412 case Type::ConstantArray: 4413 { 4414 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 4415 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 4416 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 4417 return QualType(); 4418 4419 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 4420 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 4421 QualType ResultType = mergeTypes(LHSElem, RHSElem); 4422 if (ResultType.isNull()) return QualType(); 4423 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4424 return LHS; 4425 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4426 return RHS; 4427 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 4428 ArrayType::ArraySizeModifier(), 0); 4429 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 4430 ArrayType::ArraySizeModifier(), 0); 4431 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 4432 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 4433 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4434 return LHS; 4435 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4436 return RHS; 4437 if (LVAT) { 4438 // FIXME: This isn't correct! But tricky to implement because 4439 // the array's size has to be the size of LHS, but the type 4440 // has to be different. 4441 return LHS; 4442 } 4443 if (RVAT) { 4444 // FIXME: This isn't correct! But tricky to implement because 4445 // the array's size has to be the size of RHS, but the type 4446 // has to be different. 4447 return RHS; 4448 } 4449 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 4450 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 4451 return getIncompleteArrayType(ResultType, 4452 ArrayType::ArraySizeModifier(), 0); 4453 } 4454 case Type::FunctionNoProto: 4455 return mergeFunctionTypes(LHS, RHS); 4456 case Type::Record: 4457 case Type::Enum: 4458 return QualType(); 4459 case Type::Builtin: 4460 // Only exactly equal builtin types are compatible, which is tested above. 4461 return QualType(); 4462 case Type::Complex: 4463 // Distinct complex types are incompatible. 4464 return QualType(); 4465 case Type::Vector: 4466 // FIXME: The merged type should be an ExtVector! 4467 if (areCompatVectorTypes(LHS->getAs<VectorType>(), RHS->getAs<VectorType>())) 4468 return LHS; 4469 return QualType(); 4470 case Type::ObjCInterface: { 4471 // Check if the interfaces are assignment compatible. 4472 // FIXME: This should be type compatibility, e.g. whether 4473 // "LHS x; RHS x;" at global scope is legal. 4474 const ObjCInterfaceType* LHSIface = LHS->getAs<ObjCInterfaceType>(); 4475 const ObjCInterfaceType* RHSIface = RHS->getAs<ObjCInterfaceType>(); 4476 if (LHSIface && RHSIface && 4477 canAssignObjCInterfaces(LHSIface, RHSIface)) 4478 return LHS; 4479 4480 return QualType(); 4481 } 4482 case Type::ObjCObjectPointer: { 4483 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(), 4484 RHS->getAs<ObjCObjectPointerType>())) 4485 return LHS; 4486 4487 return QualType(); 4488 } 4489 case Type::FixedWidthInt: 4490 // Distinct fixed-width integers are not compatible. 4491 return QualType(); 4492 case Type::TemplateSpecialization: 4493 assert(false && "Dependent types have no size"); 4494 break; 4495 } 4496 4497 return QualType(); 4498} 4499 4500//===----------------------------------------------------------------------===// 4501// Integer Predicates 4502//===----------------------------------------------------------------------===// 4503 4504unsigned ASTContext::getIntWidth(QualType T) { 4505 if (T->isBooleanType()) 4506 return 1; 4507 if (FixedWidthIntType *FWIT = dyn_cast<FixedWidthIntType>(T)) { 4508 return FWIT->getWidth(); 4509 } 4510 // For builtin types, just use the standard type sizing method 4511 return (unsigned)getTypeSize(T); 4512} 4513 4514QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 4515 assert(T->isSignedIntegerType() && "Unexpected type"); 4516 4517 // Turn <4 x signed int> -> <4 x unsigned int> 4518 if (const VectorType *VTy = T->getAs<VectorType>()) 4519 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()), 4520 VTy->getNumElements()); 4521 4522 // For enums, we return the unsigned version of the base type. 4523 if (const EnumType *ETy = T->getAs<EnumType>()) 4524 T = ETy->getDecl()->getIntegerType(); 4525 4526 const BuiltinType *BTy = T->getAs<BuiltinType>(); 4527 assert(BTy && "Unexpected signed integer type"); 4528 switch (BTy->getKind()) { 4529 case BuiltinType::Char_S: 4530 case BuiltinType::SChar: 4531 return UnsignedCharTy; 4532 case BuiltinType::Short: 4533 return UnsignedShortTy; 4534 case BuiltinType::Int: 4535 return UnsignedIntTy; 4536 case BuiltinType::Long: 4537 return UnsignedLongTy; 4538 case BuiltinType::LongLong: 4539 return UnsignedLongLongTy; 4540 case BuiltinType::Int128: 4541 return UnsignedInt128Ty; 4542 default: 4543 assert(0 && "Unexpected signed integer type"); 4544 return QualType(); 4545 } 4546} 4547 4548ExternalASTSource::~ExternalASTSource() { } 4549 4550void ExternalASTSource::PrintStats() { } 4551 4552 4553//===----------------------------------------------------------------------===// 4554// Builtin Type Computation 4555//===----------------------------------------------------------------------===// 4556 4557/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 4558/// pointer over the consumed characters. This returns the resultant type. 4559static QualType DecodeTypeFromStr(const char *&Str, ASTContext &Context, 4560 ASTContext::GetBuiltinTypeError &Error, 4561 bool AllowTypeModifiers = true) { 4562 // Modifiers. 4563 int HowLong = 0; 4564 bool Signed = false, Unsigned = false; 4565 4566 // Read the modifiers first. 4567 bool Done = false; 4568 while (!Done) { 4569 switch (*Str++) { 4570 default: Done = true; --Str; break; 4571 case 'S': 4572 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 4573 assert(!Signed && "Can't use 'S' modifier multiple times!"); 4574 Signed = true; 4575 break; 4576 case 'U': 4577 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 4578 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 4579 Unsigned = true; 4580 break; 4581 case 'L': 4582 assert(HowLong <= 2 && "Can't have LLLL modifier"); 4583 ++HowLong; 4584 break; 4585 } 4586 } 4587 4588 QualType Type; 4589 4590 // Read the base type. 4591 switch (*Str++) { 4592 default: assert(0 && "Unknown builtin type letter!"); 4593 case 'v': 4594 assert(HowLong == 0 && !Signed && !Unsigned && 4595 "Bad modifiers used with 'v'!"); 4596 Type = Context.VoidTy; 4597 break; 4598 case 'f': 4599 assert(HowLong == 0 && !Signed && !Unsigned && 4600 "Bad modifiers used with 'f'!"); 4601 Type = Context.FloatTy; 4602 break; 4603 case 'd': 4604 assert(HowLong < 2 && !Signed && !Unsigned && 4605 "Bad modifiers used with 'd'!"); 4606 if (HowLong) 4607 Type = Context.LongDoubleTy; 4608 else 4609 Type = Context.DoubleTy; 4610 break; 4611 case 's': 4612 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 4613 if (Unsigned) 4614 Type = Context.UnsignedShortTy; 4615 else 4616 Type = Context.ShortTy; 4617 break; 4618 case 'i': 4619 if (HowLong == 3) 4620 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 4621 else if (HowLong == 2) 4622 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 4623 else if (HowLong == 1) 4624 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 4625 else 4626 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 4627 break; 4628 case 'c': 4629 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 4630 if (Signed) 4631 Type = Context.SignedCharTy; 4632 else if (Unsigned) 4633 Type = Context.UnsignedCharTy; 4634 else 4635 Type = Context.CharTy; 4636 break; 4637 case 'b': // boolean 4638 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 4639 Type = Context.BoolTy; 4640 break; 4641 case 'z': // size_t. 4642 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 4643 Type = Context.getSizeType(); 4644 break; 4645 case 'F': 4646 Type = Context.getCFConstantStringType(); 4647 break; 4648 case 'a': 4649 Type = Context.getBuiltinVaListType(); 4650 assert(!Type.isNull() && "builtin va list type not initialized!"); 4651 break; 4652 case 'A': 4653 // This is a "reference" to a va_list; however, what exactly 4654 // this means depends on how va_list is defined. There are two 4655 // different kinds of va_list: ones passed by value, and ones 4656 // passed by reference. An example of a by-value va_list is 4657 // x86, where va_list is a char*. An example of by-ref va_list 4658 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 4659 // we want this argument to be a char*&; for x86-64, we want 4660 // it to be a __va_list_tag*. 4661 Type = Context.getBuiltinVaListType(); 4662 assert(!Type.isNull() && "builtin va list type not initialized!"); 4663 if (Type->isArrayType()) { 4664 Type = Context.getArrayDecayedType(Type); 4665 } else { 4666 Type = Context.getLValueReferenceType(Type); 4667 } 4668 break; 4669 case 'V': { 4670 char *End; 4671 unsigned NumElements = strtoul(Str, &End, 10); 4672 assert(End != Str && "Missing vector size"); 4673 4674 Str = End; 4675 4676 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 4677 Type = Context.getVectorType(ElementType, NumElements); 4678 break; 4679 } 4680 case 'X': { 4681 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 4682 Type = Context.getComplexType(ElementType); 4683 break; 4684 } 4685 case 'P': 4686 Type = Context.getFILEType(); 4687 if (Type.isNull()) { 4688 Error = ASTContext::GE_Missing_stdio; 4689 return QualType(); 4690 } 4691 break; 4692 case 'J': 4693 if (Signed) 4694 Type = Context.getsigjmp_bufType(); 4695 else 4696 Type = Context.getjmp_bufType(); 4697 4698 if (Type.isNull()) { 4699 Error = ASTContext::GE_Missing_setjmp; 4700 return QualType(); 4701 } 4702 break; 4703 } 4704 4705 if (!AllowTypeModifiers) 4706 return Type; 4707 4708 Done = false; 4709 while (!Done) { 4710 switch (*Str++) { 4711 default: Done = true; --Str; break; 4712 case '*': 4713 Type = Context.getPointerType(Type); 4714 break; 4715 case '&': 4716 Type = Context.getLValueReferenceType(Type); 4717 break; 4718 // FIXME: There's no way to have a built-in with an rvalue ref arg. 4719 case 'C': 4720 Type = Type.withConst(); 4721 break; 4722 } 4723 } 4724 4725 return Type; 4726} 4727 4728/// GetBuiltinType - Return the type for the specified builtin. 4729QualType ASTContext::GetBuiltinType(unsigned id, 4730 GetBuiltinTypeError &Error) { 4731 const char *TypeStr = BuiltinInfo.GetTypeString(id); 4732 4733 llvm::SmallVector<QualType, 8> ArgTypes; 4734 4735 Error = GE_None; 4736 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error); 4737 if (Error != GE_None) 4738 return QualType(); 4739 while (TypeStr[0] && TypeStr[0] != '.') { 4740 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error); 4741 if (Error != GE_None) 4742 return QualType(); 4743 4744 // Do array -> pointer decay. The builtin should use the decayed type. 4745 if (Ty->isArrayType()) 4746 Ty = getArrayDecayedType(Ty); 4747 4748 ArgTypes.push_back(Ty); 4749 } 4750 4751 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 4752 "'.' should only occur at end of builtin type list!"); 4753 4754 // handle untyped/variadic arguments "T c99Style();" or "T cppStyle(...);". 4755 if (ArgTypes.size() == 0 && TypeStr[0] == '.') 4756 return getFunctionNoProtoType(ResType); 4757 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), 4758 TypeStr[0] == '.', 0); 4759} 4760 4761QualType 4762ASTContext::UsualArithmeticConversionsType(QualType lhs, QualType rhs) { 4763 // Perform the usual unary conversions. We do this early so that 4764 // integral promotions to "int" can allow us to exit early, in the 4765 // lhs == rhs check. Also, for conversion purposes, we ignore any 4766 // qualifiers. For example, "const float" and "float" are 4767 // equivalent. 4768 if (lhs->isPromotableIntegerType()) 4769 lhs = getPromotedIntegerType(lhs); 4770 else 4771 lhs = lhs.getUnqualifiedType(); 4772 if (rhs->isPromotableIntegerType()) 4773 rhs = getPromotedIntegerType(rhs); 4774 else 4775 rhs = rhs.getUnqualifiedType(); 4776 4777 // If both types are identical, no conversion is needed. 4778 if (lhs == rhs) 4779 return lhs; 4780 4781 // If either side is a non-arithmetic type (e.g. a pointer), we are done. 4782 // The caller can deal with this (e.g. pointer + int). 4783 if (!lhs->isArithmeticType() || !rhs->isArithmeticType()) 4784 return lhs; 4785 4786 // At this point, we have two different arithmetic types. 4787 4788 // Handle complex types first (C99 6.3.1.8p1). 4789 if (lhs->isComplexType() || rhs->isComplexType()) { 4790 // if we have an integer operand, the result is the complex type. 4791 if (rhs->isIntegerType() || rhs->isComplexIntegerType()) { 4792 // convert the rhs to the lhs complex type. 4793 return lhs; 4794 } 4795 if (lhs->isIntegerType() || lhs->isComplexIntegerType()) { 4796 // convert the lhs to the rhs complex type. 4797 return rhs; 4798 } 4799 // This handles complex/complex, complex/float, or float/complex. 4800 // When both operands are complex, the shorter operand is converted to the 4801 // type of the longer, and that is the type of the result. This corresponds 4802 // to what is done when combining two real floating-point operands. 4803 // The fun begins when size promotion occur across type domains. 4804 // From H&S 6.3.4: When one operand is complex and the other is a real 4805 // floating-point type, the less precise type is converted, within it's 4806 // real or complex domain, to the precision of the other type. For example, 4807 // when combining a "long double" with a "double _Complex", the 4808 // "double _Complex" is promoted to "long double _Complex". 4809 int result = getFloatingTypeOrder(lhs, rhs); 4810 4811 if (result > 0) { // The left side is bigger, convert rhs. 4812 rhs = getFloatingTypeOfSizeWithinDomain(lhs, rhs); 4813 } else if (result < 0) { // The right side is bigger, convert lhs. 4814 lhs = getFloatingTypeOfSizeWithinDomain(rhs, lhs); 4815 } 4816 // At this point, lhs and rhs have the same rank/size. Now, make sure the 4817 // domains match. This is a requirement for our implementation, C99 4818 // does not require this promotion. 4819 if (lhs != rhs) { // Domains don't match, we have complex/float mix. 4820 if (lhs->isRealFloatingType()) { // handle "double, _Complex double". 4821 return rhs; 4822 } else { // handle "_Complex double, double". 4823 return lhs; 4824 } 4825 } 4826 return lhs; // The domain/size match exactly. 4827 } 4828 // Now handle "real" floating types (i.e. float, double, long double). 4829 if (lhs->isRealFloatingType() || rhs->isRealFloatingType()) { 4830 // if we have an integer operand, the result is the real floating type. 4831 if (rhs->isIntegerType()) { 4832 // convert rhs to the lhs floating point type. 4833 return lhs; 4834 } 4835 if (rhs->isComplexIntegerType()) { 4836 // convert rhs to the complex floating point type. 4837 return getComplexType(lhs); 4838 } 4839 if (lhs->isIntegerType()) { 4840 // convert lhs to the rhs floating point type. 4841 return rhs; 4842 } 4843 if (lhs->isComplexIntegerType()) { 4844 // convert lhs to the complex floating point type. 4845 return getComplexType(rhs); 4846 } 4847 // We have two real floating types, float/complex combos were handled above. 4848 // Convert the smaller operand to the bigger result. 4849 int result = getFloatingTypeOrder(lhs, rhs); 4850 if (result > 0) // convert the rhs 4851 return lhs; 4852 assert(result < 0 && "illegal float comparison"); 4853 return rhs; // convert the lhs 4854 } 4855 if (lhs->isComplexIntegerType() || rhs->isComplexIntegerType()) { 4856 // Handle GCC complex int extension. 4857 const ComplexType *lhsComplexInt = lhs->getAsComplexIntegerType(); 4858 const ComplexType *rhsComplexInt = rhs->getAsComplexIntegerType(); 4859 4860 if (lhsComplexInt && rhsComplexInt) { 4861 if (getIntegerTypeOrder(lhsComplexInt->getElementType(), 4862 rhsComplexInt->getElementType()) >= 0) 4863 return lhs; // convert the rhs 4864 return rhs; 4865 } else if (lhsComplexInt && rhs->isIntegerType()) { 4866 // convert the rhs to the lhs complex type. 4867 return lhs; 4868 } else if (rhsComplexInt && lhs->isIntegerType()) { 4869 // convert the lhs to the rhs complex type. 4870 return rhs; 4871 } 4872 } 4873 // Finally, we have two differing integer types. 4874 // The rules for this case are in C99 6.3.1.8 4875 int compare = getIntegerTypeOrder(lhs, rhs); 4876 bool lhsSigned = lhs->isSignedIntegerType(), 4877 rhsSigned = rhs->isSignedIntegerType(); 4878 QualType destType; 4879 if (lhsSigned == rhsSigned) { 4880 // Same signedness; use the higher-ranked type 4881 destType = compare >= 0 ? lhs : rhs; 4882 } else if (compare != (lhsSigned ? 1 : -1)) { 4883 // The unsigned type has greater than or equal rank to the 4884 // signed type, so use the unsigned type 4885 destType = lhsSigned ? rhs : lhs; 4886 } else if (getIntWidth(lhs) != getIntWidth(rhs)) { 4887 // The two types are different widths; if we are here, that 4888 // means the signed type is larger than the unsigned type, so 4889 // use the signed type. 4890 destType = lhsSigned ? lhs : rhs; 4891 } else { 4892 // The signed type is higher-ranked than the unsigned type, 4893 // but isn't actually any bigger (like unsigned int and long 4894 // on most 32-bit systems). Use the unsigned type corresponding 4895 // to the signed type. 4896 destType = getCorrespondingUnsignedType(lhsSigned ? lhs : rhs); 4897 } 4898 return destType; 4899} 4900