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 HasStdExtB = false;
43  bool HasStdExtZbb = false;
44  bool HasStdExtZbc = false;
45  bool HasStdExtZbe = false;
46  bool HasStdExtZbf = false;
47  bool HasStdExtZbm = false;
48  bool HasStdExtZbp = false;
49  bool HasStdExtZbr = false;
50  bool HasStdExtZbs = false;
51  bool HasStdExtZbt = false;
52  bool HasStdExtZbproposedc = false;
53  bool HasStdExtV = false;
54  bool HasRV64 = false;
55  bool IsRV32E = false;
56  bool EnableLinkerRelax = false;
57  bool EnableRVCHintInstrs = true;
58  bool EnableSaveRestore = false;
59  unsigned XLen = 32;
60  MVT XLenVT = MVT::i32;
61  RISCVABI::ABI TargetABI = RISCVABI::ABI_Unknown;
62  BitVector UserReservedRegister;
63  RISCVFrameLowering FrameLowering;
64  RISCVInstrInfo InstrInfo;
65  RISCVRegisterInfo RegInfo;
66  RISCVTargetLowering TLInfo;
67  SelectionDAGTargetInfo TSInfo;
68
69  /// Initializes using the passed in CPU and feature strings so that we can
70  /// use initializer lists for subtarget initialization.
71  RISCVSubtarget &initializeSubtargetDependencies(const Triple &TT,
72                                                  StringRef CPU, StringRef FS,
73                                                  StringRef ABIName);
74
75public:
76  // Initializes the data members to match that of the specified triple.
77  RISCVSubtarget(const Triple &TT, StringRef CPU, StringRef FS,
78                 StringRef ABIName, const TargetMachine &TM);
79
80  // Parses features string setting specified subtarget options. The
81  // definition of this function is auto-generated by tblgen.
82  void ParseSubtargetFeatures(StringRef CPU, StringRef FS);
83
84  const RISCVFrameLowering *getFrameLowering() const override {
85    return &FrameLowering;
86  }
87  const RISCVInstrInfo *getInstrInfo() const override { return &InstrInfo; }
88  const RISCVRegisterInfo *getRegisterInfo() const override {
89    return &RegInfo;
90  }
91  const RISCVTargetLowering *getTargetLowering() const override {
92    return &TLInfo;
93  }
94  const SelectionDAGTargetInfo *getSelectionDAGInfo() const override {
95    return &TSInfo;
96  }
97  bool enableMachineScheduler() const override { return true; }
98  bool hasStdExtM() const { return HasStdExtM; }
99  bool hasStdExtA() const { return HasStdExtA; }
100  bool hasStdExtF() const { return HasStdExtF; }
101  bool hasStdExtD() const { return HasStdExtD; }
102  bool hasStdExtC() const { return HasStdExtC; }
103  bool hasStdExtB() const { return HasStdExtB; }
104  bool hasStdExtZbb() const { return HasStdExtZbb; }
105  bool hasStdExtZbc() const { return HasStdExtZbc; }
106  bool hasStdExtZbe() const { return HasStdExtZbe; }
107  bool hasStdExtZbf() const { return HasStdExtZbf; }
108  bool hasStdExtZbm() const { return HasStdExtZbm; }
109  bool hasStdExtZbp() const { return HasStdExtZbp; }
110  bool hasStdExtZbr() const { return HasStdExtZbr; }
111  bool hasStdExtZbs() const { return HasStdExtZbs; }
112  bool hasStdExtZbt() const { return HasStdExtZbt; }
113  bool hasStdExtZbproposedc() const { return HasStdExtZbproposedc; }
114  bool hasStdExtV() const { return HasStdExtV; }
115  bool is64Bit() const { return HasRV64; }
116  bool isRV32E() const { return IsRV32E; }
117  bool enableLinkerRelax() const { return EnableLinkerRelax; }
118  bool enableRVCHintInstrs() const { return EnableRVCHintInstrs; }
119  bool enableSaveRestore() const { return EnableSaveRestore; }
120  MVT getXLenVT() const { return XLenVT; }
121  unsigned getXLen() const { return XLen; }
122  RISCVABI::ABI getTargetABI() const { return TargetABI; }
123  bool isRegisterReservedByUser(Register i) const {
124    assert(i < RISCV::NUM_TARGET_REGS && "Register out of range");
125    return UserReservedRegister[i];
126  }
127
128protected:
129  // GlobalISel related APIs.
130  std::unique_ptr<CallLowering> CallLoweringInfo;
131  std::unique_ptr<InstructionSelector> InstSelector;
132  std::unique_ptr<LegalizerInfo> Legalizer;
133  std::unique_ptr<RegisterBankInfo> RegBankInfo;
134
135public:
136  const CallLowering *getCallLowering() const override;
137  InstructionSelector *getInstructionSelector() const override;
138  const LegalizerInfo *getLegalizerInfo() const override;
139  const RegisterBankInfo *getRegBankInfo() const override;
140};
141} // End llvm namespace
142
143#endif
144