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//===- PPCInstrInfo.h - PowerPC Instruction Information ---------*- 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.
//
//===----------------------------------------------------------------------===//
//
// This file contains the PowerPC implementation of the TargetInstrInfo class.
//
//===----------------------------------------------------------------------===//
#ifndef POWERPC32_INSTRUCTIONINFO_H
#define POWERPC32_INSTRUCTIONINFO_H
#include "PPC.h"
#include "llvm/Target/TargetInstrInfo.h"
#include "PPCRegisterInfo.h"
namespace llvm {
class PPCInstrInfo : public TargetInstrInfo {
const PPCRegisterInfo RI;
public:
PPCInstrInfo();
/// 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 MRegisterInfo &getRegisterInfo() const { return RI; }
//
// Return true if the instruction is a register to register move and
// leave the source and dest operands in the passed parameters.
//
virtual bool isMoveInstr(const MachineInstr& MI,
unsigned& sourceReg,
unsigned& destReg) const;
unsigned isLoadFromStackSlot(MachineInstr *MI, int &FrameIndex) const;
unsigned isStoreToStackSlot(MachineInstr *MI, int &FrameIndex) const;
// commuteInstruction - We can commute rlwimi instructions, but only if the
// rotate amt is zero. We also have to munge the immediates a bit.
virtual MachineInstr *commuteInstruction(MachineInstr *MI) const;
virtual void insertNoop(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MI) const;
static unsigned invertPPCBranchOpcode(unsigned Opcode) {
switch (Opcode) {
default: assert(0 && "Unknown PPC branch opcode!");
case PPC::BEQ: return PPC::BNE;
case PPC::BNE: return PPC::BEQ;
case PPC::BLT: return PPC::BGE;
case PPC::BGE: return PPC::BLT;
case PPC::BGT: return PPC::BLE;
case PPC::BLE: return PPC::BGT;
case PPC::BNU: return PPC::BUN;
case PPC::BUN: return PPC::BNU;
}
}
};
}
#endif
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