tools/lto/LTOCodeGenerator.h

   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
  15 #ifndef LTO_CODE_GENERATOR_H
  16 #define LTO_CODE_GENERATOR_H
  17
  18 #include "llvm/Linker.h"
  19 #include "llvm/LLVMContext.h"
  20 #include "llvm/ADT/StringMap.h"
  21 #include "llvm/ADT/SmallVector.h"
  22 #include "llvm/ADT/SmallPtrSet.h"
  23
  24 #include <string>
  25
  26
  27 //
  28 // C++ class which implements the opaque lto_code_gen_t
  29 //
  30
  31 struct LTOCodeGenerator {
  32     static const char*        getVersionString();
  33
  34                             LTOCodeGenerator();
  35                             ~LTOCodeGenerator();
  36
  37     bool                addModule(struct LTOModule*, std::string& errMsg);
  38     bool                setDebugInfo(lto_debug_model, std::string& errMsg);
  39     bool                setCodePICModel(lto_codegen_model, std::string& errMsg);
  40     void                setCpu(const char *cpu);
  41     void                addMustPreserveSymbol(const char* sym);
  42     bool                writeMergedModules(const char* path,
  43                                                            std::string& errMsg);
  44     const void*         compile(size_t* length, std::string& errMsg);
  45     void                setCodeGenDebugOptions(const char *opts);
  46 private:
  47     bool                generateObjectFile(llvm::raw_ostream& out,
  48                                            std::string& errMsg);
  49     void                applyScopeRestrictions();
  50     void                applyRestriction(llvm::GlobalValue &GV,
  51                                      std::vector<const char*> &mustPreserveList,
  52                         llvm::SmallPtrSet<llvm::GlobalValue*, 8> &asmUsed,
  53                                          llvm::Mangler &mangler);
  54     bool                determineTarget(std::string& errMsg);
  55
  56     typedef llvm::StringMap<uint8_t> StringSet;
  57
  58     llvm::LLVMContext&          _context;
  59     llvm::Linker                _linker;
  60     llvm::TargetMachine*        _target;
  61     bool                        _emitDwarfDebugInfo;
  62     bool                        _scopeRestrictionsDone;
  63     lto_codegen_model           _codeModel;
  64     StringSet                   _mustPreserveSymbols;
  65     StringSet                   _asmUndefinedRefs;
  66     llvm::MemoryBuffer*         _nativeObjectFile;
  67     std::vector<const char*>    _codegenOptions;
  68     std::string                 _mCpu;
  69 };
  70
  71 #endif // LTO_CODE_GENERATOR_H
  72