1 //===- 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_LINKER_H 11 #define LLVM_LINKER_LINKER_H 12 13 #include "llvm/ADT/SmallPtrSet.h" 14 #include <string> 15 16 namespace llvm { 17 18 class Comdat; 19 class GlobalValue; 20 class Module; 21 class StringRef; 22 class StructType; 23 24 /// This class provides the core functionality of linking in LLVM. It keeps a 25 /// pointer to the merged module so far. It doesn't take ownership of the 26 /// module since it is assumed that the user of this class will want to do 27 /// something with it after the linking. 28 class Linker { 29 public: 30 enum LinkerMode { 31 DestroySource = 0, // Allow source module to be destroyed. 32 PreserveSource = 1 // Preserve the source module. 33 }; 34 35 Linker(Module *M, bool SuppressWarnings=false); 36 ~Linker(); 37 38 Module *getModule() const { return Composite; } 39 void deleteModule(); 40 41 /// \brief Link \p Src into the composite. The source is destroyed if 42 /// \p Mode is DestroySource and preserved if it is PreserveSource. 43 /// If \p ErrorMsg is not null, information about any error is written 44 /// to it. 45 /// Returns true on error. 46 bool linkInModule(Module *Src, unsigned Mode, std::string *ErrorMsg); 47 bool linkInModule(Module *Src, std::string *ErrorMsg) { 48 return linkInModule(Src, Linker::DestroySource, ErrorMsg); 49 } 50 51 static bool LinkModules(Module *Dest, Module *Src, unsigned Mode, 52 std::string *ErrorMsg); 53 54 private: 55 Module *Composite; 56 SmallPtrSet<StructType*, 32> IdentifiedStructTypes; 57 58 bool SuppressWarnings; 59 }; 60 61 } // End llvm namespace 62 63 #endif 64
