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//===- MipsRegisterInfo.h - Mips Register Information Impl ------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file contains the Mips implementation of the TargetRegisterInfo class.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_TARGET_MIPS_MIPSREGISTERINFO_H
#define LLVM_LIB_TARGET_MIPS_MIPSREGISTERINFO_H
#include "Mips.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
#include <cstdint>
#define GET_REGINFO_HEADER
#include "MipsGenRegisterInfo.inc"
namespace llvm {
class TargetRegisterClass;
class MipsRegisterInfo : public MipsGenRegisterInfo {
public:
enum class MipsPtrClass {
/// The default register class for integer values.
Default = 0,
/// The subset of registers permitted in certain microMIPS instructions
/// such as lw16.
GPR16MM = 1,
/// The stack pointer only.
StackPointer = 2,
/// The global pointer only.
GlobalPointer = 3,
};
MipsRegisterInfo();
/// Get PIC indirect call register
static unsigned getPICCallReg();
/// Code Generation virtual methods...
const TargetRegisterClass *getPointerRegClass(const MachineFunction &MF,
unsigned Kind) const override;
unsigned getRegPressureLimit(const TargetRegisterClass *RC,
MachineFunction &MF) const override;
const MCPhysReg *getCalleeSavedRegs(const MachineFunction *MF) const override;
const uint32_t *getCallPreservedMask(const MachineFunction &MF,
CallingConv::ID) const override;
static const uint32_t *getMips16RetHelperMask();
BitVector getReservedRegs(const MachineFunction &MF) const override;
bool requiresRegisterScavenging(const MachineFunction &MF) const override;
/// Stack Frame Processing Methods
void eliminateFrameIndex(MachineBasicBlock::iterator II,
int SPAdj, unsigned FIOperandNum,
RegScavenger *RS = nullptr) const override;
// Stack realignment queries.
bool canRealignStack(const MachineFunction &MF) const override;
/// Debug information queries.
Register getFrameRegister(const MachineFunction &MF) const override;
/// Return GPR register class.
virtual const TargetRegisterClass *intRegClass(unsigned Size) const = 0;
private:
virtual void eliminateFI(MachineBasicBlock::iterator II, unsigned OpNo,
int FrameIndex, uint64_t StackSize,
int64_t SPOffset) const = 0;
};
} // end namespace llvm
#endif // LLVM_LIB_TARGET_MIPS_MIPSREGISTERINFO_H
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