llvm-mirror/lib/Target/Sparc/SparcV9CodeEmitter.h

//===-- SparcV9CodeEmitter.h ------------------------------------*- C++ -*-===//
// 
//
//===----------------------------------------------------------------------===//

#ifndef SPARCV9CODEEMITTER_H
#define SPARCV9CODEEMITTER_H

#include "llvm/BasicBlock.h"
#include "llvm/CodeGen/MachineCodeEmitter.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/Target/TargetMachine.h"

class GlobalValue;
class MachineInstr;
class MachineOperand;

class SparcV9CodeEmitter : public MachineFunctionPass {
  TargetMachine &TM;
  MachineCodeEmitter &MCE;
  BasicBlock *currBB;

  // Tracks which instruction references which BasicBlock
  std::vector<std::pair<BasicBlock*,
                        std::pair<unsigned*,MachineInstr*> > > BBRefs;
  // Tracks where each BasicBlock starts
  std::map<BasicBlock*, long> BBLocations;

  // Tracks locations of Constants which are laid out in memory (e.g. FP)
  // But we also need to map Constants to ConstantPool indices
  std::map<const Constant*, unsigned> ConstantMap;

public:
  SparcV9CodeEmitter(TargetMachine &T, MachineCodeEmitter &M);
  ~SparcV9CodeEmitter();

  bool runOnMachineFunction(MachineFunction &F);
  void emitWord(unsigned Val);
    
  /// Function generated by the CodeEmitterGenerator using TableGen
  ///
  unsigned getBinaryCodeForInstr(MachineInstr &MI);

private:    
  int64_t getMachineOpValue(MachineInstr &MI, MachineOperand &MO);
  unsigned getValueBit(int64_t Val, unsigned bit);
  void emitBasicBlock(MachineBasicBlock &MBB);
  void* getGlobalAddress(GlobalValue *V, MachineInstr &MI,
                         bool isPCRelative);
  bool isFPInstr(MachineInstr &MI);
  unsigned getRealRegNum(unsigned fakeReg, unsigned regClass,
                         MachineInstr &MI);

};

#endif