1 //===-LTOCodeGenerator.h - LLVM Link Time Optimizer -----------------------===// 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 // This file declares the LTOCodeGenerator class. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef LTO_CODE_GENERATOR_H 15 #define LTO_CODE_GENERATOR_H 16 17 #include "llvm/Linker.h" 18 #include "llvm/ADT/StringMap.h" 19 #include "llvm/ADT/SmallPtrSet.h" 20 #include "llvm-c/lto.h" 21 #include <string> 22 23 namespace llvm { 24 class LLVMContext; 25 class GlobalValue; 26 class Mangler; 27 class MemoryBuffer; 28 class TargetMachine; 29 class raw_ostream; 30 } 31 32 //===----------------------------------------------------------------------===// 33 /// LTOCodeGenerator - C++ class which implements the opaque lto_code_gen_t 34 /// type. 35 /// 36 struct LTOCodeGenerator { 37 static const char *getVersionString(); 38 39 LTOCodeGenerator(); 40 ~LTOCodeGenerator(); 41 42 bool addModule(struct LTOModule*, std::string &errMsg); 43 bool setDebugInfo(lto_debug_model, std::string &errMsg); 44 bool setCodePICModel(lto_codegen_model, std::string &errMsg); 45 setCpuLTOCodeGenerator46 void setCpu(const char* mCpu) { _mCpu = mCpu; } 47 addMustPreserveSymbolLTOCodeGenerator48 void addMustPreserveSymbol(const char* sym) { 49 _mustPreserveSymbols[sym] = 1; 50 } 51 52 bool writeMergedModules(const char *path, std::string &errMsg); 53 bool compile_to_file(const char **name, std::string &errMsg); 54 const void *compile(size_t *length, std::string &errMsg); 55 void setCodeGenDebugOptions(const char *opts); 56 57 private: 58 bool generateObjectFile(llvm::raw_ostream &out, std::string &errMsg); 59 void applyScopeRestrictions(); 60 void applyRestriction(llvm::GlobalValue &GV, 61 std::vector<const char*> &mustPreserveList, 62 llvm::SmallPtrSet<llvm::GlobalValue*, 8> &asmUsed, 63 llvm::Mangler &mangler); 64 bool determineTarget(std::string &errMsg); 65 66 typedef llvm::StringMap<uint8_t> StringSet; 67 68 llvm::LLVMContext& _context; 69 llvm::Linker _linker; 70 llvm::TargetMachine* _target; 71 bool _emitDwarfDebugInfo; 72 bool _scopeRestrictionsDone; 73 lto_codegen_model _codeModel; 74 StringSet _mustPreserveSymbols; 75 StringSet _asmUndefinedRefs; 76 llvm::MemoryBuffer* _nativeObjectFile; 77 std::vector<char*> _codegenOptions; 78 std::string _mCpu; 79 std::string _nativeObjectPath; 80 }; 81 82 #endif // LTO_CODE_GENERATOR_H 83