lib/Target/R600/AMDGPUInstrInfo.h

   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 AMDGPUINSTRUCTIONINFO_H
  17 #define AMDGPUINSTRUCTIONINFO_H
  18
  19 #include "AMDGPUInstrInfo.h"
  20 #include "AMDGPURegisterInfo.h"
  21 #include "llvm/Target/TargetInstrInfo.h"
  22 #include <map>
  23
  24 #define GET_INSTRINFO_HEADER
  25 #define GET_INSTRINFO_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
  33 namespace llvm {
  34
  35 class AMDGPUTargetMachine;
  36 class MachineFunction;
  37 class MachineInstr;
  38 class MachineInstrBuilder;
  39
  40 class AMDGPUInstrInfo : public AMDGPUGenInstrInfo {
  41 private:
  42   const AMDGPURegisterInfo RI;
  43   TargetMachine &TM;
  44   bool getNextBranchInstr(MachineBasicBlock::iterator &iter,
  45                           MachineBasicBlock &MBB) const;
  46 public:
  47   explicit AMDGPUInstrInfo(TargetMachine &tm);
  48
  49   virtual const AMDGPURegisterInfo &getRegisterInfo() const = 0;
  50
  51   bool isCoalescableExtInstr(const MachineInstr &MI, unsigned &SrcReg,
  52                              unsigned &DstReg, unsigned &SubIdx) const;
  53
  54   unsigned isLoadFromStackSlot(const MachineInstr *MI, int &FrameIndex) const;
  55   unsigned isLoadFromStackSlotPostFE(const MachineInstr *MI,
  56                                      int &FrameIndex) const;
  57   bool hasLoadFromStackSlot(const MachineInstr *MI,
  58                             const MachineMemOperand *&MMO,
  59                             int &FrameIndex) const;
  60   unsigned isStoreFromStackSlot(const MachineInstr *MI, int &FrameIndex) const;
  61   unsigned isStoreFromStackSlotPostFE(const MachineInstr *MI,
  62                                       int &FrameIndex) const;
  63   bool hasStoreFromStackSlot(const MachineInstr *MI,
  64                              const MachineMemOperand *&MMO,
  65                              int &FrameIndex) const;
  66
  67   MachineInstr *
  68   convertToThreeAddress(MachineFunction::iterator &MFI,
  69                         MachineBasicBlock::iterator &MBBI,
  70                         LiveVariables *LV) const;
  71
  72
  73   virtual void copyPhysReg(MachineBasicBlock &MBB,
  74                            MachineBasicBlock::iterator MI, DebugLoc DL,
  75                            unsigned DestReg, unsigned SrcReg,
  76                            bool KillSrc) const = 0;
  77
  78   void storeRegToStackSlot(MachineBasicBlock &MBB,
  79                            MachineBasicBlock::iterator MI,
  80                            unsigned SrcReg, bool isKill, int FrameIndex,
  81                            const TargetRegisterClass *RC,
  82                            const TargetRegisterInfo *TRI) const;
  83   void loadRegFromStackSlot(MachineBasicBlock &MBB,
  84                             MachineBasicBlock::iterator MI,
  85                             unsigned DestReg, int FrameIndex,
  86                             const TargetRegisterClass *RC,
  87                             const TargetRegisterInfo *TRI) const;
  88
  89 protected:
  90   MachineInstr *foldMemoryOperandImpl(MachineFunction &MF,
  91                                       MachineInstr *MI,
  92                                       const SmallVectorImpl<unsigned> &Ops,
  93                                       int FrameIndex) const;
  94   MachineInstr *foldMemoryOperandImpl(MachineFunction &MF,
  95                                       MachineInstr *MI,
  96                                       const SmallVectorImpl<unsigned> &Ops,
  97                                       MachineInstr *LoadMI) const;
  98 public:
  99   bool canFoldMemoryOperand(const MachineInstr *MI,
 100                             const SmallVectorImpl<unsigned> &Ops) const;
 101   bool unfoldMemoryOperand(MachineFunction &MF, MachineInstr *MI,
 102                            unsigned Reg, bool UnfoldLoad, bool UnfoldStore,
 103                            SmallVectorImpl<MachineInstr *> &NewMIs) const;
 104   bool unfoldMemoryOperand(SelectionDAG &DAG, SDNode *N,
 105                            SmallVectorImpl<SDNode *> &NewNodes) const;
 106   unsigned getOpcodeAfterMemoryUnfold(unsigned Opc,
 107                                       bool UnfoldLoad, bool UnfoldStore,
 108                                       unsigned *LoadRegIndex = 0) const;
 109   bool shouldScheduleLoadsNear(SDNode *Load1, SDNode *Load2,
 110                                int64_t Offset1, int64_t Offset2,
 111                                unsigned NumLoads) const;
 112
 113   bool ReverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond) const;
 114   void insertNoop(MachineBasicBlock &MBB,
 115                   MachineBasicBlock::iterator MI) const;
 116   bool isPredicated(const MachineInstr *MI) const;
 117   bool SubsumesPredicate(const SmallVectorImpl<MachineOperand> &Pred1,
 118                          const SmallVectorImpl<MachineOperand> &Pred2) const;
 119   bool DefinesPredicate(MachineInstr *MI,
 120                         std::vector<MachineOperand> &Pred) const;
 121   bool isPredicable(MachineInstr *MI) const;
 122   bool isSafeToMoveRegClassDefs(const TargetRegisterClass *RC) const;
 123
 124   // Helper functions that check the opcode for status information
 125   bool isLoadInst(llvm::MachineInstr *MI) const;
 126   bool isExtLoadInst(llvm::MachineInstr *MI) const;
 127   bool isSWSExtLoadInst(llvm::MachineInstr *MI) const;
 128   bool isSExtLoadInst(llvm::MachineInstr *MI) const;
 129   bool isZExtLoadInst(llvm::MachineInstr *MI) const;
 130   bool isAExtLoadInst(llvm::MachineInstr *MI) const;
 131   bool isStoreInst(llvm::MachineInstr *MI) const;
 132   bool isTruncStoreInst(llvm::MachineInstr *MI) const;
 133
 134   virtual MachineInstr* getMovImmInstr(MachineFunction *MF, unsigned DstReg,
 135                                        int64_t Imm) const = 0;
 136   virtual unsigned getIEQOpcode() const = 0;
 137   virtual bool isMov(unsigned opcode) const = 0;
 138
 139   /// \brief Convert the AMDIL MachineInstr to a supported ISA
 140   /// MachineInstr
 141   virtual void convertToISA(MachineInstr & MI, MachineFunction &MF,
 142     DebugLoc DL) const;
 143
 144 };
 145
 146 } // End llvm namespace
 147
 148 #endif // AMDGPUINSTRINFO_H