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 struct LTOCodeGenerator {
  31     static const char*        getVersionString();
  32
  33                             LTOCodeGenerator();
  34                             ~LTOCodeGenerator();
  35
  36     bool                addModule(struct LTOModule*, std::string& errMsg);
  37     bool                setDebugInfo(lto_debug_model, std::string& errMsg);
  38     bool                setCodePICModel(lto_codegen_model, std::string& errMsg);
  39     void                setCpu(const char *cpu);
  40     void                setAssemblerPath(const char* path);
  41     void                setAssemblerArgs(const char** args, int nargs);
  42     void                addMustPreserveSymbol(const char* sym);
  43     bool                writeMergedModules(const char* path,
  44                                                            std::string& errMsg);
  45     const void*         compile(size_t* length, std::string& errMsg);
  46     void                setCodeGenDebugOptions(const char *opts);
  47 private:
  48     bool                generateAssemblyCode(llvm::raw_ostream& out,
  49                                              std::string& errMsg);
  50     bool                assemble(const std::string& asmPath,
  51                             const std::string& objPath, std::string& errMsg);
  52     void                applyScopeRestrictions();
  53     bool                determineTarget(std::string& errMsg);
  54
  55     typedef llvm::StringMap<uint8_t> StringSet;
  56
  57     llvm::LLVMContext&          _context;
  58     llvm::Linker                _linker;
  59     llvm::TargetMachine*        _target;
  60     bool                        _emitDwarfDebugInfo;
  61     bool                        _scopeRestrictionsDone;
  62     lto_codegen_model           _codeModel;
  63     StringSet                   _mustPreserveSymbols;
  64     llvm::MemoryBuffer*         _nativeObjectFile;
  65     std::vector<const char*>    _codegenOptions;
  66     llvm::sys::Path*            _assemblerPath;
  67     std::string                 _mCpu;
  68     std::vector<std::string>    _assemblerArgs;
  69 };
  70
  71 #endif // LTO_CODE_GENERATOR_H
  72