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#pragma once 
 
#ifdef __GNUC__ 
#pragma GCC diagnostic push 
#pragma GCC diagnostic ignored "-Wunused-parameter" 
#endif 
 
//===- Linker.h - Module Linker Interface -----------------------*- C++ -*-===// 
// 
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 
// See https://llvm.org/LICENSE.txt for license information. 
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 
// 
//===----------------------------------------------------------------------===// 
 
#ifndef LLVM_LINKER_LINKER_H 
#define LLVM_LINKER_LINKER_H 
 
#include "llvm/ADT/StringSet.h" 
#include "llvm/Linker/IRMover.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 { 
  IRMover Mover; 
 
public: 
  enum Flags { 
    None = 0, 
    OverrideFromSrc = (1 << 0), 
    LinkOnlyNeeded = (1 << 1), 
  }; 
 
  Linker(Module &M); 
 
  /// Link \p Src into the composite. 
  /// 
  /// Passing OverrideSymbols as true will have symbols from Src 
  /// shadow those in the Dest. 
  /// 
  /// Passing InternalizeCallback will have the linker call the function with 
  /// the new module and a list of global value names to be internalized by the 
  /// callback. 
  /// 
  /// Returns true on error. 
  bool linkInModule(std::unique_ptr<Module> Src, unsigned Flags = Flags::None, 
                    std::function<void(Module &, const StringSet<> &)> 
                        InternalizeCallback = {}); 
 
  static bool linkModules(Module &Dest, std::unique_ptr<Module> Src, 
                          unsigned Flags = Flags::None, 
                          std::function<void(Module &, const StringSet<> &)> 
                              InternalizeCallback = {}); 
}; 
 
} // End llvm namespace 
 
#endif 
 
#ifdef __GNUC__ 
#pragma GCC diagnostic pop 
#endif