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//===- Linker.h - Module Linker Interface -----------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LINKER_LINKER_H
#define LLVM_LINKER_LINKER_H
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/DenseSet.h"
#include "llvm/IR/DiagnosticInfo.h"
namespace llvm {
class Module;
class StructType;
class Type;
/// This class provides the core functionality of linking in LLVM. It keeps a
/// pointer to the merged module so far. It doesn't take ownership of the
/// module since it is assumed that the user of this class will want to do
/// something with it after the linking.
class Linker {
public:
struct StructTypeKeyInfo {
struct KeyTy {
ArrayRef<Type *> ETypes;
bool IsPacked;
KeyTy(ArrayRef<Type *> E, bool P);
KeyTy(const StructType *ST);
bool operator==(const KeyTy &that) const;
bool operator!=(const KeyTy &that) const;
};
static StructType *getEmptyKey();
static StructType *getTombstoneKey();
static unsigned getHashValue(const KeyTy &Key);
static unsigned getHashValue(const StructType *ST);
static bool isEqual(const KeyTy &LHS, const StructType *RHS);
static bool isEqual(const StructType *LHS, const StructType *RHS);
};
typedef DenseSet<StructType *, StructTypeKeyInfo> NonOpaqueStructTypeSet;
typedef DenseSet<StructType *> OpaqueStructTypeSet;
struct IdentifiedStructTypeSet {
// The set of opaque types is the composite module.
OpaqueStructTypeSet OpaqueStructTypes;
// The set of identified but non opaque structures in the composite module.
NonOpaqueStructTypeSet NonOpaqueStructTypes;
void addNonOpaque(StructType *Ty);
void addOpaque(StructType *Ty);
StructType *findNonOpaque(ArrayRef<Type *> ETypes, bool IsPacked);
bool hasType(StructType *Ty);
};
Linker(Module *M, DiagnosticHandlerFunction DiagnosticHandler);
Linker(Module *M);
~Linker();
Module *getModule() const { return Composite; }
void deleteModule();
/// \brief Link \p Src into the composite. The source is destroyed.
/// Returns true on error.
bool linkInModule(Module *Src);
/// \brief Set the composite to the passed-in module.
void setModule(Module *Dst);
static bool LinkModules(Module *Dest, Module *Src,
DiagnosticHandlerFunction DiagnosticHandler);
static bool LinkModules(Module *Dest, Module *Src);
private:
void init(Module *M, DiagnosticHandlerFunction DiagnosticHandler);
Module *Composite;
IdentifiedStructTypeSet IdentifiedStructTypes;
DiagnosticHandlerFunction DiagnosticHandler;
};
} // End llvm namespace
#endif
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