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/ADT/StringMap.h"
  20 #include "llvm/ADT/SmallVector.h"
  21
  22 #include <string>
  23
  24
  25 //
  26 // C++ class which implements the opaque lto_code_gen_t
  27 //
  28 class LTOCodeGenerator {
  29 public:
  30     static const char*        getVersionString();
  31
  32                             LTOCodeGenerator();
  33                             ~LTOCodeGenerator();
  34
  35     bool                addModule(class LTOModule*, std::string& errMsg);
  36     bool                setDebugInfo(lto_debug_model, std::string& errMsg);
  37     bool                setCodePICModel(lto_codegen_model, std::string& errMsg);
  38     void                addMustPreserveSymbol(const char* sym);
  39     bool                writeMergedModules(const char* path,
  40                                                            std::string& errMsg);
  41     const void*         compile(size_t* length, std::string& errMsg);
  42     void                setCodeGenDebugOptions(const char *opts) {
  43                           _codegenOptions.push_back(std::string(opts));
  44                         }
  45 private:
  46     bool                generateAssemblyCode(std::ostream& out,
  47                                                         std::string& errMsg);
  48     bool                assemble(const std::string& asmPath,
  49                             const std::string& objPath, std::string& errMsg);
  50     void                applyScopeRestrictions();
  51     bool                determineTarget(std::string& errMsg);
  52
  53     typedef llvm::StringMap<uint8_t> StringSet;
  54
  55     llvm::Linker                _linker;
  56     llvm::TargetMachine*        _target;
  57     bool                        _emitDwarfDebugInfo;
  58     bool                        _scopeRestrictionsDone;
  59     lto_codegen_model           _codeModel;
  60     StringSet                   _mustPreserveSymbols;
  61     llvm::MemoryBuffer*         _nativeObjectFile;
  62     llvm::SmallVector<std::string, 4> _codegenOptions;
  63 };
  64
  65 #endif // LTO_CODE_GENERATOR_H
  66