AMDGPUInstrInfo.h revision 37ed9c199ca639565f6ce88105f9e39e898d82d0 
1//===-- AMDGPUInstrInfo.h - AMDGPU Instruction Information ------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10/// \file
11/// \brief Contains the definition of a TargetInstrInfo class that is common
12/// to all AMD GPUs.
13//
14//===----------------------------------------------------------------------===//
15
16#ifndef LLVM_LIB_TARGET_R600_AMDGPUINSTRINFO_H
17#define LLVM_LIB_TARGET_R600_AMDGPUINSTRINFO_H
18
19#include "AMDGPURegisterInfo.h"
20#include "llvm/Target/TargetInstrInfo.h"
21#include <map>
22
23#define GET_INSTRINFO_HEADER
24#define GET_INSTRINFO_ENUM
25#define GET_INSTRINFO_OPERAND_ENUM
26#include "AMDGPUGenInstrInfo.inc"
27
28#define OPCODE_IS_ZERO_INT AMDGPU::PRED_SETE_INT
29#define OPCODE_IS_NOT_ZERO_INT AMDGPU::PRED_SETNE_INT
30#define OPCODE_IS_ZERO AMDGPU::PRED_SETE
31#define OPCODE_IS_NOT_ZERO AMDGPU::PRED_SETNE
32
33namespace llvm {
34
35class AMDGPUSubtarget;
36class MachineFunction;
37class MachineInstr;
38class MachineInstrBuilder;
39
40class AMDGPUInstrInfo : public AMDGPUGenInstrInfo {
41private:
42  const AMDGPURegisterInfo RI;
43  virtual void anchor();
44protected:
45  const AMDGPUSubtarget &ST;
46public:
47  explicit AMDGPUInstrInfo(const AMDGPUSubtarget &st);
48
49  virtual const AMDGPURegisterInfo &getRegisterInfo() const = 0;
50
51  bool isCoalescableExtInstr(const MachineInstr &MI, unsigned &SrcReg,
52                             unsigned &DstReg, unsigned &SubIdx) const override;
53
54  unsigned isLoadFromStackSlot(const MachineInstr *MI,
55                               int &FrameIndex) const override;
56  unsigned isLoadFromStackSlotPostFE(const MachineInstr *MI,
57                                     int &FrameIndex) const override;
58  bool hasLoadFromStackSlot(const MachineInstr *MI,
59                            const MachineMemOperand *&MMO,
60                            int &FrameIndex) const override;
61  unsigned isStoreFromStackSlot(const MachineInstr *MI, int &FrameIndex) const;
62  unsigned isStoreFromStackSlotPostFE(const MachineInstr *MI,
63                                      int &FrameIndex) const;
64  bool hasStoreFromStackSlot(const MachineInstr *MI,
65                             const MachineMemOperand *&MMO,
66                             int &FrameIndex) const;
67
68  MachineInstr *
69  convertToThreeAddress(MachineFunction::iterator &MFI,
70                        MachineBasicBlock::iterator &MBBI,
71                        LiveVariables *LV) const override;
72
73
74  bool expandPostRAPseudo(MachineBasicBlock::iterator MI) const override;
75
76  void storeRegToStackSlot(MachineBasicBlock &MBB,
77                           MachineBasicBlock::iterator MI,
78                           unsigned SrcReg, bool isKill, int FrameIndex,
79                           const TargetRegisterClass *RC,
80                           const TargetRegisterInfo *TRI) const override;
81  void loadRegFromStackSlot(MachineBasicBlock &MBB,
82                            MachineBasicBlock::iterator MI,
83                            unsigned DestReg, int FrameIndex,
84                            const TargetRegisterClass *RC,
85                            const TargetRegisterInfo *TRI) const override;
86
87protected:
88  MachineInstr *foldMemoryOperandImpl(MachineFunction &MF,
89                                      MachineInstr *MI,
90                                      const SmallVectorImpl<unsigned> &Ops,
91                                      int FrameIndex) const override;
92  MachineInstr *foldMemoryOperandImpl(MachineFunction &MF,
93                                      MachineInstr *MI,
94                                      const SmallVectorImpl<unsigned> &Ops,
95                                      MachineInstr *LoadMI) const override;
96public:
97  /// \returns the smallest register index that will be accessed by an indirect
98  /// read or write or -1 if indirect addressing is not used by this program.
99  int getIndirectIndexBegin(const MachineFunction &MF) const;
100
101  /// \returns the largest register index that will be accessed by an indirect
102  /// read or write or -1 if indirect addressing is not used by this program.
103  int getIndirectIndexEnd(const MachineFunction &MF) const;
104
105  bool canFoldMemoryOperand(const MachineInstr *MI,
106                           const SmallVectorImpl<unsigned> &Ops) const override;
107  bool unfoldMemoryOperand(MachineFunction &MF, MachineInstr *MI,
108                        unsigned Reg, bool UnfoldLoad, bool UnfoldStore,
109                        SmallVectorImpl<MachineInstr *> &NewMIs) const override;
110  bool unfoldMemoryOperand(SelectionDAG &DAG, SDNode *N,
111                           SmallVectorImpl<SDNode *> &NewNodes) const override;
112  unsigned getOpcodeAfterMemoryUnfold(unsigned Opc,
113                               bool UnfoldLoad, bool UnfoldStore,
114                               unsigned *LoadRegIndex = nullptr) const override;
115
116  bool enableClusterLoads() const override;
117
118  bool shouldScheduleLoadsNear(SDNode *Load1, SDNode *Load2,
119                               int64_t Offset1, int64_t Offset2,
120                               unsigned NumLoads) const override;
121
122  bool
123  ReverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond) const override;
124  void insertNoop(MachineBasicBlock &MBB,
125                  MachineBasicBlock::iterator MI) const override;
126  bool isPredicated(const MachineInstr *MI) const override;
127  bool SubsumesPredicate(const SmallVectorImpl<MachineOperand> &Pred1,
128                   const SmallVectorImpl<MachineOperand> &Pred2) const override;
129  bool DefinesPredicate(MachineInstr *MI,
130                        std::vector<MachineOperand> &Pred) const override;
131  bool isPredicable(MachineInstr *MI) const override;
132  bool isSafeToMoveRegClassDefs(const TargetRegisterClass *RC) const override;
133
134  // Helper functions that check the opcode for status information
135  bool isRegisterStore(const MachineInstr &MI) const;
136  bool isRegisterLoad(const MachineInstr &MI) const;
137
138//===---------------------------------------------------------------------===//
139// Pure virtual funtions to be implemented by sub-classes.
140//===---------------------------------------------------------------------===//
141
142  virtual bool isMov(unsigned opcode) const = 0;
143
144  /// \brief Calculate the "Indirect Address" for the given \p RegIndex and
145  ///        \p Channel
146  ///
147  /// We model indirect addressing using a virtual address space that can be
148  /// accesed with loads and stores.  The "Indirect Address" is the memory
149  /// address in this virtual address space that maps to the given \p RegIndex
150  /// and \p Channel.
151  virtual unsigned calculateIndirectAddress(unsigned RegIndex,
152                                            unsigned Channel) const = 0;
153
154  /// \returns The register class to be used for loading and storing values
155  /// from an "Indirect Address" .
156  virtual const TargetRegisterClass *getIndirectAddrRegClass() const = 0;
157
158  /// \brief Build instruction(s) for an indirect register write.
159  ///
160  /// \returns The instruction that performs the indirect register write
161  virtual MachineInstrBuilder buildIndirectWrite(MachineBasicBlock *MBB,
162                                    MachineBasicBlock::iterator I,
163                                    unsigned ValueReg, unsigned Address,
164                                    unsigned OffsetReg) const = 0;
165
166  /// \brief Build instruction(s) for an indirect register read.
167  ///
168  /// \returns The instruction that performs the indirect register read
169  virtual MachineInstrBuilder buildIndirectRead(MachineBasicBlock *MBB,
170                                    MachineBasicBlock::iterator I,
171                                    unsigned ValueReg, unsigned Address,
172                                    unsigned OffsetReg) const = 0;
173
174  /// \brief Build a MOV instruction.
175  virtual MachineInstr *buildMovInstr(MachineBasicBlock *MBB,
176                                      MachineBasicBlock::iterator I,
177                                      unsigned DstReg, unsigned SrcReg) const = 0;
178
179  /// \brief Given a MIMG \p Opcode that writes all 4 channels, return the
180  /// equivalent opcode that writes \p Channels Channels.
181  int getMaskedMIMGOp(uint16_t Opcode, unsigned Channels) const;
182
183};
184
185namespace AMDGPU {
186  int16_t getNamedOperandIdx(uint16_t Opcode, uint16_t NamedIndex);
187}  // End namespace AMDGPU
188
189} // End llvm namespace
190
191#define AMDGPU_FLAG_REGISTER_LOAD  (UINT64_C(1) << 63)
192#define AMDGPU_FLAG_REGISTER_STORE (UINT64_C(1) << 62)
193
194#endif
195