1 //===-- AMDGPUInstrInfo.h - AMDGPU Instruction Information ------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
11 /// \brief Contains the definition of a TargetInstrInfo class that is common
14 //===----------------------------------------------------------------------===//
16 #ifndef LLVM_LIB_TARGET_R600_AMDGPUINSTRINFO_H
17 #define LLVM_LIB_TARGET_R600_AMDGPUINSTRINFO_H
19 #include "AMDGPURegisterInfo.h"
20 #include "llvm/Target/TargetInstrInfo.h"
23 #define GET_INSTRINFO_HEADER
24 #define GET_INSTRINFO_ENUM
25 #define GET_INSTRINFO_OPERAND_ENUM
26 #include "AMDGPUGenInstrInfo.inc"
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
35 class AMDGPUSubtarget;
36 class MachineFunction;
38 class MachineInstrBuilder;
40 class AMDGPUInstrInfo : public AMDGPUGenInstrInfo {
42 const AMDGPURegisterInfo RI;
43 virtual void anchor();
45 const AMDGPUSubtarget &ST;
47 explicit AMDGPUInstrInfo(const AMDGPUSubtarget &st);
49 virtual const AMDGPURegisterInfo &getRegisterInfo() const = 0;
51 bool isCoalescableExtInstr(const MachineInstr &MI, unsigned &SrcReg,
52 unsigned &DstReg, unsigned &SubIdx) const override;
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;
69 convertToThreeAddress(MachineFunction::iterator &MFI,
70 MachineBasicBlock::iterator &MBBI,
71 LiveVariables *LV) const override;
74 bool expandPostRAPseudo(MachineBasicBlock::iterator MI) const override;
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;
88 MachineInstr *foldMemoryOperandImpl(MachineFunction &MF, MachineInstr *MI,
89 ArrayRef<unsigned> Ops,
90 MachineBasicBlock::iterator InsertPt,
91 int FrameIndex) const override;
92 MachineInstr *foldMemoryOperandImpl(MachineFunction &MF, MachineInstr *MI,
93 ArrayRef<unsigned> Ops,
94 MachineBasicBlock::iterator InsertPt,
95 MachineInstr *LoadMI) const override;
98 /// \returns the smallest register index that will be accessed by an indirect
99 /// read or write or -1 if indirect addressing is not used by this program.
100 int getIndirectIndexBegin(const MachineFunction &MF) const;
102 /// \returns the largest register index that will be accessed by an indirect
103 /// read or write or -1 if indirect addressing is not used by this program.
104 int getIndirectIndexEnd(const MachineFunction &MF) const;
106 bool canFoldMemoryOperand(const MachineInstr *MI,
107 ArrayRef<unsigned> Ops) const override;
108 bool unfoldMemoryOperand(MachineFunction &MF, MachineInstr *MI,
109 unsigned Reg, bool UnfoldLoad, bool UnfoldStore,
110 SmallVectorImpl<MachineInstr *> &NewMIs) const override;
111 bool unfoldMemoryOperand(SelectionDAG &DAG, SDNode *N,
112 SmallVectorImpl<SDNode *> &NewNodes) const override;
113 unsigned getOpcodeAfterMemoryUnfold(unsigned Opc,
114 bool UnfoldLoad, bool UnfoldStore,
115 unsigned *LoadRegIndex = nullptr) const override;
117 bool enableClusterLoads() const override;
119 bool shouldScheduleLoadsNear(SDNode *Load1, SDNode *Load2,
120 int64_t Offset1, int64_t Offset2,
121 unsigned NumLoads) const override;
124 ReverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond) const override;
125 void insertNoop(MachineBasicBlock &MBB,
126 MachineBasicBlock::iterator MI) const override;
127 bool isPredicated(const MachineInstr *MI) const override;
128 bool SubsumesPredicate(ArrayRef<MachineOperand> Pred1,
129 ArrayRef<MachineOperand> Pred2) const override;
130 bool DefinesPredicate(MachineInstr *MI,
131 std::vector<MachineOperand> &Pred) const override;
132 bool isPredicable(MachineInstr *MI) const override;
133 bool isSafeToMoveRegClassDefs(const TargetRegisterClass *RC) const override;
135 // Helper functions that check the opcode for status information
136 bool isRegisterStore(const MachineInstr &MI) const;
137 bool isRegisterLoad(const MachineInstr &MI) const;
139 /// \brief Return a target-specific opcode if Opcode is a pseudo instruction.
140 /// Return -1 if the target-specific opcode for the pseudo instruction does
141 /// not exist. If Opcode is not a pseudo instruction, this is identity.
142 int pseudoToMCOpcode(int Opcode) const;
144 /// \brief Return the descriptor of the target-specific machine instruction
145 /// that corresponds to the specified pseudo or native opcode.
146 const MCInstrDesc &getMCOpcodeFromPseudo(unsigned Opcode) const {
147 return get(pseudoToMCOpcode(Opcode));
150 //===---------------------------------------------------------------------===//
151 // Pure virtual funtions to be implemented by sub-classes.
152 //===---------------------------------------------------------------------===//
154 virtual bool isMov(unsigned opcode) const = 0;
156 /// \brief Calculate the "Indirect Address" for the given \p RegIndex and
159 /// We model indirect addressing using a virtual address space that can be
160 /// accesed with loads and stores. The "Indirect Address" is the memory
161 /// address in this virtual address space that maps to the given \p RegIndex
163 virtual unsigned calculateIndirectAddress(unsigned RegIndex,
164 unsigned Channel) const = 0;
166 /// \returns The register class to be used for loading and storing values
167 /// from an "Indirect Address" .
168 virtual const TargetRegisterClass *getIndirectAddrRegClass() const = 0;
170 /// \brief Build instruction(s) for an indirect register write.
172 /// \returns The instruction that performs the indirect register write
173 virtual MachineInstrBuilder buildIndirectWrite(MachineBasicBlock *MBB,
174 MachineBasicBlock::iterator I,
175 unsigned ValueReg, unsigned Address,
176 unsigned OffsetReg) const = 0;
178 /// \brief Build instruction(s) for an indirect register read.
180 /// \returns The instruction that performs the indirect register read
181 virtual MachineInstrBuilder buildIndirectRead(MachineBasicBlock *MBB,
182 MachineBasicBlock::iterator I,
183 unsigned ValueReg, unsigned Address,
184 unsigned OffsetReg) const = 0;
186 /// \brief Build a MOV instruction.
187 virtual MachineInstr *buildMovInstr(MachineBasicBlock *MBB,
188 MachineBasicBlock::iterator I,
189 unsigned DstReg, unsigned SrcReg) const = 0;
191 /// \brief Given a MIMG \p Opcode that writes all 4 channels, return the
192 /// equivalent opcode that writes \p Channels Channels.
193 int getMaskedMIMGOp(uint16_t Opcode, unsigned Channels) const;
198 int16_t getNamedOperandIdx(uint16_t Opcode, uint16_t NamedIndex);
199 } // End namespace AMDGPU
201 } // End llvm namespace
203 #define AMDGPU_FLAG_REGISTER_LOAD (UINT64_C(1) << 63)
204 #define AMDGPU_FLAG_REGISTER_STORE (UINT64_C(1) << 62)