1 //===- llvm/Linker.h - Module Linker Interface ------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #ifndef LLVM_LINKER_H 11 #define LLVM_LINKER_H 12 13 #include "llvm/ADT/SmallPtrSet.h" 14 #include <string> 15 16 namespace llvm { 17 18 class Module; 19 class StringRef; 20 class StructType; 21 22 /// This class provides the core functionality of linking in LLVM. It keeps a 23 /// pointer to the merged module so far. It doesn't take ownership of the 24 /// module since it is assumed that the user of this class will want to do 25 /// something with it after the linking. 26 class Linker { 27 public: 28 enum LinkerMode { 29 DestroySource = 0, // Allow source module to be destroyed. 30 PreserveSource = 1 // Preserve the source module. 31 }; 32 33 Linker(Module *M); 34 ~Linker(); 35 Module *getModule() const { return Composite; } 36 37 /// \brief Link \p Src into the composite. The source is destroyed if 38 /// \p Mode is DestroySource and preserved if it is PreserveSource. 39 /// If \p ErrorMsg is not null, information about any error is written 40 /// to it. 41 /// Returns true on error. 42 bool linkInModule(Module *Src, unsigned Mode, std::string *ErrorMsg); 43 bool linkInModule(Module *Src, std::string *ErrorMsg) { 44 return linkInModule(Src, Linker::DestroySource, ErrorMsg); 45 } 46 47 static bool LinkModules(Module *Dest, Module *Src, unsigned Mode, 48 std::string *ErrorMsg); 49 50 private: 51 Module *Composite; 52 SmallPtrSet<StructType*, 32> IdentifiedStructTypes; 53 }; 54 55 } // End llvm namespace 56 57 #endif 58
