lib/Target/MSP430/MSP430InstrInfo.h

   1 //===- MSP430InstrInfo.h - MSP430 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 // This file contains the MSP430 implementation of the TargetInstrInfo class.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #ifndef LLVM_TARGET_MSP430INSTRINFO_H
  15 #define LLVM_TARGET_MSP430INSTRINFO_H
  16
  17 #include "llvm/Target/TargetInstrInfo.h"
  18 #include "MSP430RegisterInfo.h"
  19
  20 #define GET_INSTRINFO_HEADER
  21 #include "MSP430GenInstrInfo.inc"
  22
  23 namespace llvm {
  24
  25 class MSP430TargetMachine;
  26
  27 /// MSP430II - This namespace holds all of the target specific flags that
  28 /// instruction info tracks.
  29 ///
  30 namespace MSP430II {
  31   enum {
  32     SizeShift   = 2,
  33     SizeMask    = 7 << SizeShift,
  34
  35     SizeUnknown = 0 << SizeShift,
  36     SizeSpecial = 1 << SizeShift,
  37     Size2Bytes  = 2 << SizeShift,
  38     Size4Bytes  = 3 << SizeShift,
  39     Size6Bytes  = 4 << SizeShift
  40   };
  41 }
  42
  43 class MSP430InstrInfo : public MSP430GenInstrInfo {
  44   const MSP430RegisterInfo RI;
  45   MSP430TargetMachine &TM;
  46 public:
  47   explicit MSP430InstrInfo(MSP430TargetMachine &TM);
  48
  49   /// getRegisterInfo - TargetInstrInfo is a superset of MRegister info.  As
  50   /// such, whenever a client has an instance of instruction info, it should
  51   /// always be able to get register info as well (through this method).
  52   ///
  53   virtual const TargetRegisterInfo &getRegisterInfo() const { return RI; }
  54
  55   void copyPhysReg(MachineBasicBlock &MBB,
  56                    MachineBasicBlock::iterator I, DebugLoc DL,
  57                    unsigned DestReg, unsigned SrcReg,
  58                    bool KillSrc) const;
  59
  60   virtual void storeRegToStackSlot(MachineBasicBlock &MBB,
  61                                    MachineBasicBlock::iterator MI,
  62                                    unsigned SrcReg, bool isKill,
  63                                    int FrameIndex,
  64                                    const TargetRegisterClass *RC,
  65                                    const TargetRegisterInfo *TRI) const;
  66   virtual void loadRegFromStackSlot(MachineBasicBlock &MBB,
  67                                     MachineBasicBlock::iterator MI,
  68                                     unsigned DestReg, int FrameIdx,
  69                                     const TargetRegisterClass *RC,
  70                                     const TargetRegisterInfo *TRI) const;
  71
  72   unsigned GetInstSizeInBytes(const MachineInstr *MI) const;
  73
  74   // Branch folding goodness
  75   bool ReverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond) const;
  76   bool isUnpredicatedTerminator(const MachineInstr *MI) const;
  77   bool AnalyzeBranch(MachineBasicBlock &MBB,
  78                      MachineBasicBlock *&TBB, MachineBasicBlock *&FBB,
  79                      SmallVectorImpl<MachineOperand> &Cond,
  80                      bool AllowModify) const;
  81
  82   unsigned RemoveBranch(MachineBasicBlock &MBB) const;
  83   unsigned InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
  84                         MachineBasicBlock *FBB,
  85                         const SmallVectorImpl<MachineOperand> &Cond,
  86                         DebugLoc DL) const;
  87
  88 };
  89
  90 }
  91
  92 #endif