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
  23 #include <string>
  24
  25
  26 //
  27 // C++ class which implements the opaque lto_code_gen_t
  28 //
  29
  30 class LTOCodeGenerator {
  31 public:
  32     static const char*        getVersionString();
  33
  34                             LTOCodeGenerator();
  35                             ~LTOCodeGenerator();
  36
  37     bool                addModule(class LTOModule*, std::string& errMsg);
  38     bool                setDebugInfo(lto_debug_model, std::string& errMsg);
  39     bool                setCodePICModel(lto_codegen_model, std::string& errMsg);
  40     void                setAssemblerPath(const char* path);
  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                generateAssemblyCode(llvm::formatted_raw_ostream& out,
  48                                              std::string& errMsg);
  49     bool                assemble(const std::string& asmPath,
  50                             const std::string& objPath, std::string& errMsg);
  51     void                applyScopeRestrictions();
  52     bool                determineTarget(std::string& errMsg);
  53
  54     typedef llvm::StringMap<uint8_t> StringSet;
  55
  56     llvm::LLVMContext&          _context;
  57     llvm::Linker                _linker;
  58     llvm::TargetMachine*        _target;
  59     bool                        _emitDwarfDebugInfo;
  60     bool                        _scopeRestrictionsDone;
  61     lto_codegen_model           _codeModel;
  62     StringSet                   _mustPreserveSymbols;
  63     llvm::MemoryBuffer*         _nativeObjectFile;
  64     std::vector<const char*>    _codegenOptions;
  65     llvm::sys::Path*            _assemblerPath;
  66 };
  67
  68 #endif // LTO_CODE_GENERATOR_H
  69