tools/llc/LLCOptions.cpp

   1 // $Id$
   2 //**************************************************************************/
   3 // File:
   4 //      LLCOptions.cpp
   5 //
   6 // Purpose:
   7 //      Options for the llc compiler.
   8 //
   9 // History:
  10 //      7/15/01  -  Vikram Adve  -  Created
  11 //
  12 //**************************************************************************/
  13
  14 //************************** System Include Files **************************/
  15
  16 #include <iostream.h>
  17 #include <unistd.h>
  18
  19
  20 //*************************** User Include Files ***************************/
  21
  22 #include "llvm/Support/ProgramOptions.h"
  23 #include "llvm/Support/ProgramOption.h"
  24 #include "llvm/LLC/LLCOptions.h"
  25
  26
  27 //---------------------------------------------------------------------------
  28 // class LLCOptions
  29 //---------------------------------------------------------------------------
  30
  31 /*ctor*/
  32 LLCOptions::LLCOptions (int _argc,
  33                         const char* _argv[],
  34                         const char* _envp[])
  35   : ProgramOptions(_argc, _argv, _envp)
  36 {
  37   InitializeOptions();
  38   ParseArgs(argc, argv, envp);
  39   CheckParse();
  40 }
  41
  42 /*dtor*/
  43 LLCOptions::~LLCOptions()
  44 {}
  45
  46 //--------------------------------------------------------------------
  47 // Initialize all our compiler options
  48 //--------------------------------------------------------------------
  49
  50 void
  51 LLCOptions::InitializeOptions()
  52 {
  53   Register(new FlagOption(HELP_OPT,
  54                           "print usage message",
  55                           false /*initValue*/));
  56
  57   Register(new FlagOption(DEBUG_OPT,
  58                           "turn on default debugging options",
  59                           false /*initValue*/));
  60
  61   Register(new FlagOption(DEBUG_OPT,
  62                           "turn off all diagnostic messages",
  63                           false /*initValue*/));
  64
  65   Register(new StringOption(OUTFILENAME_OPT,
  66                             "output file name",
  67                             "" /*initValue*/));
  68
  69   Register(new IntegerValuedOption(DEBUG_INSTR_SELECT_OPT,
  70        "control amount of debugging information for instruction selection",
  71                                    0 /*initValue*/));
  72 }
  73
  74
  75 void
  76 LLCOptions::ParseExtraArgs()
  77 {
  78   if (argsConsumed != argc-1)
  79     Usage();
  80
  81   // input file name should be the last argument
  82   inputFileName = argv[argc-1];
  83
  84   // output file name may be specified with -o option;
  85   // otherwise create it from the input file name by replace ".ll" with ".o"
  86   const string &outfilenameOpt = StringOptionValue(OUTFILENAME_OPT);
  87   if (outfilenameOpt.length())
  88     {// "-o" option was used
  89       outputFileName = outfilenameOpt;
  90     }
  91   else
  92     {
  93       outputFileName = inputFileName;
  94       unsigned int suffixPos = outputFileName.rfind(".bc");
  95
  96       if (suffixPos >= outputFileName.length())
  97         suffixPos = outputFileName.rfind(".ll");
  98
  99       if (suffixPos >= outputFileName.length())
 100         {
 101           cerr << "Unrecognized suffix in file name " << inputFileName << endl;
 102           Usage();
 103         }
 104
 105       outputFileName.replace(suffixPos, 3, ".o");
 106     }
 107 }
 108
 109 //--------------------------------------------------------------------
 110 // Functions that must be overridden in subclass of ProgramOptions
 111 //--------------------------------------------------------------------
 112
 113 void
 114 LLCOptions::CheckParse()
 115 {}
 116
 117 void
 118 LLCOptions::PrintUsage(ostream& stream) const
 119 {
 120   stream << "\nUSAGE:\n\t" << ProgramName() << " [options] "
 121          << "llvm-file" << endl << endl;
 122   PrintOptions(stream);
 123 }
 124
 125