1//===-- RISCVSubtarget.h - Define Subtarget for the RISCV -------*- 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 declares the RISCV specific subclass of TargetSubtargetInfo.
10//
11//===----------------------------------------------------------------------===//
12
13#ifndef LLVM_LIB_TARGET_RISCV_RISCVSUBTARGET_H
14#define LLVM_LIB_TARGET_RISCV_RISCVSUBTARGET_H
15
16#include "RISCVFrameLowering.h"
17#include "RISCVISelLowering.h"
18#include "RISCVInstrInfo.h"
19#include "Utils/RISCVBaseInfo.h"
20#include "llvm/CodeGen/GlobalISel/CallLowering.h"
21#include "llvm/CodeGen/GlobalISel/InstructionSelector.h"
22#include "llvm/CodeGen/GlobalISel/LegalizerInfo.h"
23#include "llvm/CodeGen/GlobalISel/RegisterBankInfo.h"
24#include "llvm/CodeGen/SelectionDAGTargetInfo.h"
25#include "llvm/CodeGen/TargetSubtargetInfo.h"
26#include "llvm/IR/DataLayout.h"
27#include "llvm/Target/TargetMachine.h"
28
29#define GET_SUBTARGETINFO_HEADER
30#include "RISCVGenSubtargetInfo.inc"
31
32namespace llvm {
33class StringRef;
34
35class RISCVSubtarget : public RISCVGenSubtargetInfo {
36  virtual void anchor();
37  bool HasStdExtM = false;
38  bool HasStdExtA = false;
39  bool HasStdExtF = false;
40  bool HasStdExtD = false;
41  bool HasStdExtC = false;
42  bool HasRV64 = false;
43  bool IsRV32E = false;
44  bool EnableLinkerRelax = false;
45  bool EnableRVCHintInstrs = false;
46  unsigned XLen = 32;
47  MVT XLenVT = MVT::i32;
48  RISCVABI::ABI TargetABI = RISCVABI::ABI_Unknown;
49  BitVector UserReservedRegister;
50  RISCVFrameLowering FrameLowering;
51  RISCVInstrInfo InstrInfo;
52  RISCVRegisterInfo RegInfo;
53  RISCVTargetLowering TLInfo;
54  SelectionDAGTargetInfo TSInfo;
55
56  /// Initializes using the passed in CPU and feature strings so that we can
57  /// use initializer lists for subtarget initialization.
58  RISCVSubtarget &initializeSubtargetDependencies(const Triple &TT,
59                                                  StringRef CPU, StringRef FS,
60                                                  StringRef ABIName);
61
62public:
63  // Initializes the data members to match that of the specified triple.
64  RISCVSubtarget(const Triple &TT, StringRef CPU, StringRef FS,
65                 StringRef ABIName, const TargetMachine &TM);
66
67  // Parses features string setting specified subtarget options. The
68  // definition of this function is auto-generated by tblgen.
69  void ParseSubtargetFeatures(StringRef CPU, StringRef FS);
70
71  const RISCVFrameLowering *getFrameLowering() const override {
72    return &FrameLowering;
73  }
74  const RISCVInstrInfo *getInstrInfo() const override { return &InstrInfo; }
75  const RISCVRegisterInfo *getRegisterInfo() const override {
76    return &RegInfo;
77  }
78  const RISCVTargetLowering *getTargetLowering() const override {
79    return &TLInfo;
80  }
81  const SelectionDAGTargetInfo *getSelectionDAGInfo() const override {
82    return &TSInfo;
83  }
84  bool enableMachineScheduler() const override { return true; }
85  bool hasStdExtM() const { return HasStdExtM; }
86  bool hasStdExtA() const { return HasStdExtA; }
87  bool hasStdExtF() const { return HasStdExtF; }
88  bool hasStdExtD() const { return HasStdExtD; }
89  bool hasStdExtC() const { return HasStdExtC; }
90  bool is64Bit() const { return HasRV64; }
91  bool isRV32E() const { return IsRV32E; }
92  bool enableLinkerRelax() const { return EnableLinkerRelax; }
93  bool enableRVCHintInstrs() const { return EnableRVCHintInstrs; }
94  MVT getXLenVT() const { return XLenVT; }
95  unsigned getXLen() const { return XLen; }
96  RISCVABI::ABI getTargetABI() const { return TargetABI; }
97  bool isRegisterReservedByUser(Register i) const {
98    assert(i < RISCV::NUM_TARGET_REGS && "Register out of range");
99    return UserReservedRegister[i];
100  }
101
102protected:
103  // GlobalISel related APIs.
104  std::unique_ptr<CallLowering> CallLoweringInfo;
105  std::unique_ptr<InstructionSelector> InstSelector;
106  std::unique_ptr<LegalizerInfo> Legalizer;
107  std::unique_ptr<RegisterBankInfo> RegBankInfo;
108
109public:
110  const CallLowering *getCallLowering() const override;
111  InstructionSelector *getInstructionSelector() const override;
112  const LegalizerInfo *getLegalizerInfo() const override;
113  const RegisterBankInfo *getRegBankInfo() const override;
114};
115} // End llvm namespace
116
117#endif
118