llvm-6502/lib/Target/PIC16/PIC16InstrInfo.h

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//===- PIC16InstrInfo.h - PIC16 Instruction Information----------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the niversity of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains the PIC16 implementation of the TargetInstrInfo class.
//
//===----------------------------------------------------------------------===//
#ifndef PIC16INSTRUCTIONINFO_H
#define PIC16INSTRUCTIONINFO_H
#include "PIC16.h"
#include "PIC16RegisterInfo.h"
#include "llvm/Target/TargetInstrInfo.h"
namespace llvm {
class PIC16InstrInfo : public TargetInstrInfoImpl
{
PIC16TargetMachine &TM;
const PIC16RegisterInfo RI;
public:
explicit PIC16InstrInfo(PIC16TargetMachine &TM);
/// getRegisterInfo - TargetInstrInfo is a superset of MRegister info. As
/// such, whenever a client has an instance of instruction info, it should
/// always be able to get register info as well (through this method).
///
virtual const PIC16RegisterInfo &getRegisterInfo() const { return RI; }
/// isLoadFromStackSlot - If the specified machine instruction is a direct
/// load from a stack slot, return the virtual or physical register number of
/// the destination along with the FrameIndex of the loaded stack slot. If
/// not, return 0. This predicate must return 0 if the instruction has
/// any side effects other than loading from the stack slot.
virtual unsigned isLoadFromStackSlot(MachineInstr *MI, int &FrameIndex) const;
/// isStoreToStackSlot - If the specified machine instruction is a direct
/// store to a stack slot, return the virtual or physical register number of
/// the source reg along with the FrameIndex of the loaded stack slot. If
/// not, return 0. This predicate must return 0 if the instruction has
/// any side effects other than storing to the stack slot.
virtual unsigned isStoreToStackSlot(MachineInstr *MI, int &FrameIndex) const;
/// Used for spilling a register
void storeRegToStackSlot(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MI,
unsigned SrcReg, bool isKill, int FrameIndex,
const TargetRegisterClass *RC) const;
void loadRegFromStackSlot(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MI,
unsigned DestReg, int FrameIndex,
const TargetRegisterClass *RC) const;
/// InsertBranch - Insert a branch into the end of the specified
/// MachineBasicBlock. This operands to this method are the same as those
/// returned by AnalyzeBranch. This is invoked in cases where AnalyzeBranch
/// returns success and when an unconditional branch (TBB is non-null, FBB is
/// null, Cond is empty) needs to be inserted. It returns the number of
/// instructions inserted.
virtual unsigned InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
MachineBasicBlock *FBB,
const SmallVectorImpl<MachineOperand> &Cond) const ;
};
} // namespace llvm
#endif