// $Id$
//***************************************************************************
// File:
//	llc.cpp
// 
// Purpose:
//	Driver for llc compiler.
// 
// History:
//	7/15/01	 -  Vikram Adve  -  Created
// 
//**************************************************************************/

#include "llvm/Module.h"
#include "llvm/Method.h"
#include "llvm/Bytecode/Reader.h"
#include "llvm/Optimizations/Normalize.h"
#include "llvm/CodeGen/InstrSelection.h"
#include "llvm/CodeGen/InstrScheduling.h"
#include "llvm/CodeGen/Sparc.h"
#include "llvm/Support/CommandLine.h"

cl::String InputFilename ("", "Input filename", cl::NoFlags, "-");
cl::String OutputFilename("o", "Output filename", cl::NoFlags, "");


void
NormalizeMethod(Method* method)
{
  NormalizePhiConstantArgs(method);
}


static bool
CompileModule(Module *M, TargetMachine &target)
{
  bool failed = false;
  
  for (Module::const_iterator MI = M->begin(), ME = M->end(); MI != ME; ++MI)
    {
      Method* method = *MI;
      
      NormalizeMethod(method);
      
      failed = SelectInstructionsForMethod(method, target);
      if (failed)
	{
	  cerr << "Instruction selection failed for method "
	       << method->getName() << "\n\n";
	  break;
	}

      failed = ScheduleInstructionsWithSSA(method, target);
      if (failed)
	{
	  cerr << "Instruction scheduling before allocation failed for method "
	       << method->getName() << "\n\n";
	  break;
	}
    }
  
  return failed;
}



//---------------------------------------------------------------------------
// Function main()
// 
// Entry point for the llc compiler.
//---------------------------------------------------------------------------

int
main(int argc, char** argv)
{
  cl::ParseCommandLineOptions(argc, argv, " llvm system compiler\n");
  UltraSparc target;
  
  Module *module = ParseBytecodeFile(InputFilename);
  if (module == 0) {
    cerr << "bytecode didn't read correctly.\n";
    return 1;
  }

  if (CompileModule(module, target)) {
    cerr << "Error compiling " << InputFilename << "!\n";
    delete module;
    return 1;
  }
  
  // Clean up and exit
  delete module;
  return 0;
}