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//===- ThumbRegisterInfo.h - Thumb Register Information Impl -*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains the Thumb implementation of the TargetRegisterInfo
// class. With the exception of emitLoadConstPool Thumb2 tracks
// ARMBaseRegisterInfo, Thumb1 overloads the functions below.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_TARGET_ARM_THUMB1REGISTERINFO_H
#define LLVM_LIB_TARGET_ARM_THUMB1REGISTERINFO_H
#include "ARMBaseRegisterInfo.h"
#include "llvm/Target/TargetRegisterInfo.h"
namespace llvm {
class ARMSubtarget;
class ARMBaseInstrInfo;
struct ThumbRegisterInfo : public ARMBaseRegisterInfo {
public:
ThumbRegisterInfo();
const TargetRegisterClass *
getLargestLegalSuperClass(const TargetRegisterClass *RC,
const MachineFunction &MF) const override;
const TargetRegisterClass *
getPointerRegClass(const MachineFunction &MF,
unsigned Kind = 0) const override;
/// emitLoadConstPool - Emits a load from constpool to materialize the
/// specified immediate.
void
emitLoadConstPool(MachineBasicBlock &MBB, MachineBasicBlock::iterator &MBBI,
DebugLoc dl, unsigned DestReg, unsigned SubIdx, int Val,
ARMCC::CondCodes Pred = ARMCC::AL, unsigned PredReg = 0,
unsigned MIFlags = MachineInstr::NoFlags) const override;
// rewrite MI to access 'Offset' bytes from the FP. Update Offset to be
// however much remains to be handled. Return 'true' if no further
// work is required.
bool rewriteFrameIndex(MachineBasicBlock::iterator II, unsigned FrameRegIdx,
unsigned FrameReg, int &Offset,
const ARMBaseInstrInfo &TII) const;
void resolveFrameIndex(MachineInstr &MI, unsigned BaseReg,
int64_t Offset) const override;
bool saveScavengerRegister(MachineBasicBlock &MBB,
MachineBasicBlock::iterator I,
MachineBasicBlock::iterator &UseMI,
const TargetRegisterClass *RC,
unsigned Reg) const override;
void eliminateFrameIndex(MachineBasicBlock::iterator II,
int SPAdj, unsigned FIOperandNum,
RegScavenger *RS = nullptr) const override;
};
}
#endif
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