1//===- MipsRegisterInfo.h - Mips Register Information Impl ------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file contains the Mips implementation of the TargetRegisterInfo class.
10//
11//===----------------------------------------------------------------------===//
12
13#ifndef LLVM_LIB_TARGET_MIPS_MIPSREGISTERINFO_H
14#define LLVM_LIB_TARGET_MIPS_MIPSREGISTERINFO_H
15
16#include "Mips.h"
17#include "llvm/CodeGen/MachineBasicBlock.h"
18#include <cstdint>
19
20#define GET_REGINFO_HEADER
21#include "MipsGenRegisterInfo.inc"
22
23namespace llvm {
24
25class TargetRegisterClass;
26
27class MipsRegisterInfo : public MipsGenRegisterInfo {
28public:
29 enum class MipsPtrClass {
30 /// The default register class for integer values.
31 Default = 0,
32 /// The subset of registers permitted in certain microMIPS instructions
33 /// such as lw16.
34 GPR16MM = 1,
35 /// The stack pointer only.
36 StackPointer = 2,
37 /// The global pointer only.
38 GlobalPointer = 3,
39 };
40
41 MipsRegisterInfo();
42
43 /// Get PIC indirect call register
44 static unsigned getPICCallReg();
45
46 /// Code Generation virtual methods...
47 const TargetRegisterClass *getPointerRegClass(const MachineFunction &MF,
48 unsigned Kind) const override;
49
50 unsigned getRegPressureLimit(const TargetRegisterClass *RC,
51 MachineFunction &MF) const override;
52 const MCPhysReg *getCalleeSavedRegs(const MachineFunction *MF) const override;
53 const uint32_t *getCallPreservedMask(const MachineFunction &MF,
54 CallingConv::ID) const override;
55 static const uint32_t *getMips16RetHelperMask();
56
57 BitVector getReservedRegs(const MachineFunction &MF) const override;
58
59 /// Stack Frame Processing Methods
60 bool eliminateFrameIndex(MachineBasicBlock::iterator II,
61 int SPAdj, unsigned FIOperandNum,
62 RegScavenger *RS = nullptr) const override;
63
64 // Stack realignment queries.
65 bool canRealignStack(const MachineFunction &MF) const override;
66
67 /// Debug information queries.
68 Register getFrameRegister(const MachineFunction &MF) const override;
69
70 /// Return GPR register class.
71 virtual const TargetRegisterClass *intRegClass(unsigned Size) const = 0;
72
73private:
74 virtual void eliminateFI(MachineBasicBlock::iterator II, unsigned OpNo,
75 int FrameIndex, uint64_t StackSize,
76 int64_t SPOffset) const = 0;
77};
78
79} // end namespace llvm
80
81#endif // LLVM_LIB_TARGET_MIPS_MIPSREGISTERINFO_H
82