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//===- ARMInstrInfo.h - ARM Instruction Information -------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by the "Instituto Nokia de Tecnologia" and
// is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains the ARM implementation of the TargetInstrInfo class.
//
//===----------------------------------------------------------------------===//
#ifndef ARMINSTRUCTIONINFO_H
#define ARMINSTRUCTIONINFO_H
#include "llvm/Target/TargetInstrInfo.h"
#include "ARMRegisterInfo.h"
namespace llvm {
class ARMSubtarget;
/// ARMII - This namespace holds all of the target specific flags that
/// instruction info tracks.
///
namespace ARMII {
enum {
//===------------------------------------------------------------------===//
// Instruction Flags.
//===------------------------------------------------------------------===//
// This three-bit field describes the addressing mode used. Zero is unused
// so that we can tell if we forgot to set a value.
AddrModeMask = 0xf,
AddrMode1 = 1,
AddrMode2 = 2,
AddrMode3 = 3,
AddrMode4 = 4,
AddrMode5 = 5,
AddrModeT1 = 6,
AddrModeT2 = 7,
AddrModeT4 = 8,
AddrModeTs = 9, // i8 * 4 for pc and sp relative data
// Size* - Flags to keep track of the size of an instruction.
SizeShift = 4,
SizeMask = 7 << SizeShift,
SizeSpecial = 1, // 0 byte pseudo or special case.
Size8Bytes = 2,
Size4Bytes = 3,
Size2Bytes = 4,
// IndexMode - Unindex, pre-indexed, or post-indexed. Only valid for load
// and store ops
IndexModeShift = 7,
IndexModeMask = 3 << IndexModeShift,
IndexModePre = 1,
IndexModePost = 2,
// Opcode
OpcodeShift = 9,
OpcodeMask = 0xf << OpcodeShift
};
}
class ARMInstrInfo : public TargetInstrInfo {
const ARMRegisterInfo RI;
public:
ARMInstrInfo(const ARMSubtarget &STI);
/// 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; }
/// getPointerRegClass - Return the register class to use to hold pointers.
/// This is used for addressing modes.
virtual const TargetRegisterClass *getPointerRegClass() const;
/// 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 &SrcReg, unsigned &DstReg) const;
virtual unsigned isLoadFromStackSlot(MachineInstr *MI, int &FrameIndex) const;
virtual unsigned isStoreToStackSlot(MachineInstr *MI, int &FrameIndex) const;
virtual MachineInstr *convertToThreeAddress(MachineFunction::iterator &MFI,
MachineBasicBlock::iterator &MBBI,
LiveVariables &LV) const;
// Branch analysis.
virtual bool AnalyzeBranch(MachineBasicBlock &MBB, MachineBasicBlock *&TBB,
MachineBasicBlock *&FBB,
std::vector<MachineOperand> &Cond) const;
virtual unsigned RemoveBranch(MachineBasicBlock &MBB) const;
virtual unsigned InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
MachineBasicBlock *FBB,
const std::vector<MachineOperand> &Cond) const;
virtual bool BlockHasNoFallThrough(MachineBasicBlock &MBB) const;
virtual bool ReverseBranchCondition(std::vector<MachineOperand> &Cond) const;
// Predication support.
virtual bool isPredicated(const MachineInstr *MI) const;
virtual
bool PredicateInstruction(MachineInstr *MI,
const std::vector<MachineOperand> &Pred) const;
virtual
bool SubsumesPredicate(const std::vector<MachineOperand> &Pred1,
const std::vector<MachineOperand> &Pred1) const;
virtual bool DefinesPredicate(MachineInstr *MI,
std::vector<MachineOperand> &Pred) const;
};
// Utility routines
namespace ARM {
/// GetInstSize - Returns the size of the specified MachineInstr.
///
unsigned GetInstSize(MachineInstr *MI);
/// GetFunctionSize - Returns the size of the specified MachineFunction.
///
unsigned GetFunctionSize(MachineFunction &MF);
}
}
#endif
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