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//===-- SparcV9CodeEmitter.h ------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by the LLVM research group and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// TODO: Need a description here.
//
//===----------------------------------------------------------------------===//
#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;
const BasicBlock *currBB;
// Tracks which instruction references which BasicBlock
std::vector<std::pair<const BasicBlock*,
std::pair<unsigned*,MachineInstr*> > > BBRefs;
// Tracks where each BasicBlock starts
std::map<const BasicBlock*, long> BBLocations;
public:
SparcV9CodeEmitter(TargetMachine &T, MachineCodeEmitter &M);
~SparcV9CodeEmitter();
/// runOnMachineFunction - emits the given machine function to memory.
///
bool runOnMachineFunction(MachineFunction &F);
/// emitWord - writes out the given 32-bit value to memory at the current PC.
///
void emitWord(unsigned Val);
/// getBinaryCodeForInstr - This function, generated by the
/// CodeEmitterGenerator using TableGen, produces the binary encoding for
/// machine instructions.
///
unsigned getBinaryCodeForInstr(MachineInstr &MI);
/// emitFarCall - produces a code sequence to make a call to a destination
/// that does not fit in the 30 bits that a call instruction allows.
/// If the function F is non-null, this also saves the return address in
/// the LazyResolver map of the JITResolver.
void emitFarCall(uint64_t Addr, Function *F = 0);
private:
/// getMachineOpValue -
///
int64_t getMachineOpValue(MachineInstr &MI, MachineOperand &MO);
/// emitBasicBlock -
///
void emitBasicBlock(MachineBasicBlock &MBB);
/// getValueBit -
///
unsigned getValueBit(int64_t Val, unsigned bit);
/// getGlobalAddress -
///
void* getGlobalAddress(GlobalValue *V, MachineInstr &MI,
bool isPCRelative);
/// emitFarCall -
///
unsigned getRealRegNum(unsigned fakeReg, MachineInstr &MI);
};
#endif
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