| //===--- GlobalDecl.h - Global declaration holder ---------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // A GlobalDecl can hold either a regular variable/function or a C++ ctor/dtor |
| // together with its type. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef CLANG_CODEGEN_GLOBALDECL_H |
| #define CLANG_CODEGEN_GLOBALDECL_H |
| |
| namespace clang { |
| |
| namespace CodeGen { |
| |
| /// GlobalDecl - represents a global declaration. This can either be a |
| /// CXXConstructorDecl and the constructor type (Base, Complete). |
| /// a CXXDestructorDecl and the destructor type (Base, Complete) or |
| /// a VarDecl, a FunctionDecl or a BlockDecl. |
| class GlobalDecl { |
| llvm::PointerIntPair<const Decl*, 2> Value; |
| |
| void Init(const Decl *D) { |
| assert(!isa<CXXConstructorDecl>(D) && "Use other ctor with ctor decls!"); |
| assert(!isa<CXXDestructorDecl>(D) && "Use other ctor with dtor decls!"); |
| |
| Value.setPointer(D); |
| } |
| |
| public: |
| GlobalDecl() {} |
| |
| GlobalDecl(const VarDecl *D) { Init(D);} |
| GlobalDecl(const FunctionDecl *D) { Init(D); } |
| GlobalDecl(const BlockDecl *D) { Init(D); } |
| GlobalDecl(const ObjCMethodDecl *D) { Init(D); } |
| |
| GlobalDecl(const CXXConstructorDecl *D, CXXCtorType Type) |
| : Value(D, Type) {} |
| GlobalDecl(const CXXDestructorDecl *D, CXXDtorType Type) |
| : Value(D, Type) {} |
| |
| const Decl *getDecl() const { return Value.getPointer(); } |
| |
| CXXCtorType getCtorType() const { |
| assert(isa<CXXConstructorDecl>(getDecl()) && "Decl is not a ctor!"); |
| return static_cast<CXXCtorType>(Value.getInt()); |
| } |
| |
| CXXDtorType getDtorType() const { |
| assert(isa<CXXDestructorDecl>(getDecl()) && "Decl is not a dtor!"); |
| return static_cast<CXXDtorType>(Value.getInt()); |
| } |
| |
| friend bool operator==(const GlobalDecl &LHS, const GlobalDecl &RHS) { |
| return LHS.Value == RHS.Value; |
| } |
| |
| void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } |
| |
| static GlobalDecl getFromOpaquePtr(void *P) { |
| GlobalDecl GD; |
| GD.Value.setFromOpaqueValue(P); |
| return GD; |
| } |
| }; |
| |
| } // end namespace CodeGen |
| } // end namespace clang |
| |
| namespace llvm { |
| template<class> struct DenseMapInfo; |
| |
| template<> struct DenseMapInfo<clang::CodeGen::GlobalDecl> { |
| static inline clang::CodeGen::GlobalDecl getEmptyKey() { |
| return clang::CodeGen::GlobalDecl(); |
| } |
| |
| static inline clang::CodeGen::GlobalDecl getTombstoneKey() { |
| return clang::CodeGen::GlobalDecl:: |
| getFromOpaquePtr(reinterpret_cast<void*>(-1)); |
| } |
| |
| static unsigned getHashValue(clang::CodeGen::GlobalDecl GD) { |
| return DenseMapInfo<void*>::getHashValue(GD.getAsOpaquePtr()); |
| } |
| |
| static bool isEqual(clang::CodeGen::GlobalDecl LHS, |
| clang::CodeGen::GlobalDecl RHS) { |
| return LHS == RHS; |
| } |
| |
| static bool isPod() { |
| // GlobalDecl isn't *technically* a POD type. However, we can get |
| // away with calling it a POD type since its copy constructor, |
| // copy assignment operator, and destructor are all trivial. |
| return true; |
| } |
| |
| }; |
| |
| } |
| |
| #endif |