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//===--- 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
#include "CGCXX.h"
#include "clang/AST/DeclCXX.h"
#include "clang/AST/DeclObjC.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;
}
};
// GlobalDecl isn't *technically* a POD type. However, its copy constructor,
// copy assignment operator, and destructor are all trivial.
template <>
struct isPodLike<clang::CodeGen::GlobalDecl> {
static const bool value = true;
};
} // end namespace llvm
#endif
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