llvm/lib/Target/Sparc/SparcInstrInfo.h

   1 //===-- SparcInstrInfo.h - Sparc Instruction Information --------*- 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 contains the Sparc implementation of the TargetInstrInfo class.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #ifndef LLVM_LIB_TARGET_SPARC_SPARCINSTRINFO_H
  14 #define LLVM_LIB_TARGET_SPARC_SPARCINSTRINFO_H
  15
  16 #include "SparcRegisterInfo.h"
  17 #include "llvm/CodeGen/TargetInstrInfo.h"
  18
  19 #define GET_INSTRINFO_HEADER
  20 #include "SparcGenInstrInfo.inc"
  21
  22 namespace llvm {
  23
  24 class SparcSubtarget;
  25
  26 /// SPII - This namespace holds all of the target specific flags that
  27 /// instruction info tracks.
  28 ///
  29 namespace SPII {
  30   enum {
  31     Pseudo = (1<<0),
  32     Load = (1<<1),
  33     Store = (1<<2),
  34     DelaySlot = (1<<3)
  35   };
  36 }
  37
  38 class SparcInstrInfo : public SparcGenInstrInfo {
  39   const SparcRegisterInfo RI;
  40   const SparcSubtarget& Subtarget;
  41   virtual void anchor();
  42 public:
  43   explicit SparcInstrInfo(SparcSubtarget &ST);
  44
  45   /// getRegisterInfo - TargetInstrInfo is a superset of MRegister info.  As
  46   /// such, whenever a client has an instance of instruction info, it should
  47   /// always be able to get register info as well (through this method).
  48   ///
  49   const SparcRegisterInfo &getRegisterInfo() const { return RI; }
  50
  51   /// isLoadFromStackSlot - If the specified machine instruction is a direct
  52   /// load from a stack slot, return the virtual or physical register number of
  53   /// the destination along with the FrameIndex of the loaded stack slot.  If
  54   /// not, return 0.  This predicate must return 0 if the instruction has
  55   /// any side effects other than loading from the stack slot.
  56   Register isLoadFromStackSlot(const MachineInstr &MI,
  57                                int &FrameIndex) const override;
  58
  59   /// isStoreToStackSlot - If the specified machine instruction is a direct
  60   /// store to a stack slot, return the virtual or physical register number of
  61   /// the source reg along with the FrameIndex of the loaded stack slot.  If
  62   /// not, return 0.  This predicate must return 0 if the instruction has
  63   /// any side effects other than storing to the stack slot.
  64   Register isStoreToStackSlot(const MachineInstr &MI,
  65                               int &FrameIndex) const override;
  66
  67   MachineBasicBlock *getBranchDestBlock(const MachineInstr &MI) const override;
  68
  69   bool analyzeBranch(MachineBasicBlock &MBB, MachineBasicBlock *&TBB,
  70                      MachineBasicBlock *&FBB,
  71                      SmallVectorImpl<MachineOperand> &Cond,
  72                      bool AllowModify = false) const override;
  73
  74   unsigned removeBranch(MachineBasicBlock &MBB,
  75                         int *BytesRemoved = nullptr) const override;
  76
  77   unsigned insertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
  78                         MachineBasicBlock *FBB, ArrayRef<MachineOperand> Cond,
  79                         const DebugLoc &DL,
  80                         int *BytesAdded = nullptr) const override;
  81
  82   bool
  83   reverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond) const override;
  84
  85   /// Determine if the branch target is in range.
  86   bool isBranchOffsetInRange(unsigned BranchOpc, int64_t Offset) const override;
  87
  88   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
  89                    const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
  90                    bool KillSrc, bool RenamableDest = false,
  91                    bool RenamableSrc = false) const override;
  92
  93   void storeRegToStackSlot(MachineBasicBlock &MBB,
  94                            MachineBasicBlock::iterator MBBI, Register SrcReg,
  95                            bool isKill, int FrameIndex,
  96                            const TargetRegisterClass *RC,
  97                            const TargetRegisterInfo *TRI,
  98                            Register VReg) const override;
  99
 100   void loadRegFromStackSlot(MachineBasicBlock &MBB,
 101                             MachineBasicBlock::iterator MBBI, Register DestReg,
 102                             int FrameIndex, const TargetRegisterClass *RC,
 103                             const TargetRegisterInfo *TRI,
 104                             Register VReg) const override;
 105
 106   Register getGlobalBaseReg(MachineFunction *MF) const;
 107
 108   /// GetInstSize - Return the number of bytes of code the specified
 109   /// instruction may be.  This returns the maximum number of bytes.
 110   unsigned getInstSizeInBytes(const MachineInstr &MI) const override;
 111
 112   // Lower pseudo instructions after register allocation.
 113   bool expandPostRAPseudo(MachineInstr &MI) const override;
 114 };
 115
 116 }
 117
 118 #endif