lib/Target/ARM/Thumb1InstrInfo.h

   1 //===- Thumb1InstrInfo.h - Thumb-1 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 Thumb-1 implementation of the TargetInstrInfo class.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #ifndef THUMB1INSTRUCTIONINFO_H
  15 #define THUMB1INSTRUCTIONINFO_H
  16
  17 #include "llvm/Target/TargetInstrInfo.h"
  18 #include "ARM.h"
  19 #include "ARMInstrInfo.h"
  20 #include "Thumb1RegisterInfo.h"
  21
  22 namespace llvm {
  23   class ARMSubtarget;
  24
  25 class Thumb1InstrInfo : public ARMBaseInstrInfo {
  26   Thumb1RegisterInfo RI;
  27 public:
  28   explicit Thumb1InstrInfo(const ARMSubtarget &STI);
  29
  30   // Return the non-pre/post incrementing version of 'Opc'. Return 0
  31   // if there is not such an opcode.
  32   unsigned getUnindexedOpcode(unsigned Opc) const;
  33
  34   // Return true if the block does not fall through.
  35   bool BlockHasNoFallThrough(const MachineBasicBlock &MBB) const;
  36
  37   /// getRegisterInfo - TargetInstrInfo is a superset of MRegister info.  As
  38   /// such, whenever a client has an instance of instruction info, it should
  39   /// always be able to get register info as well (through this method).
  40   ///
  41   const Thumb1RegisterInfo &getRegisterInfo() const { return RI; }
  42
  43   bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
  44                                  MachineBasicBlock::iterator MI,
  45                                  const std::vector<CalleeSavedInfo> &CSI) const;
  46   bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
  47                                    MachineBasicBlock::iterator MI,
  48                                    const std::vector<CalleeSavedInfo> &CSI) const;
  49
  50   bool copyRegToReg(MachineBasicBlock &MBB,
  51                             MachineBasicBlock::iterator I,
  52                             unsigned DestReg, unsigned SrcReg,
  53                             const TargetRegisterClass *DestRC,
  54                             const TargetRegisterClass *SrcRC) const;
  55   void storeRegToStackSlot(MachineBasicBlock &MBB,
  56                                    MachineBasicBlock::iterator MBBI,
  57                                    unsigned SrcReg, bool isKill, int FrameIndex,
  58                                    const TargetRegisterClass *RC) const;
  59
  60   void loadRegFromStackSlot(MachineBasicBlock &MBB,
  61                                     MachineBasicBlock::iterator MBBI,
  62                                     unsigned DestReg, int FrameIndex,
  63                                     const TargetRegisterClass *RC) const;
  64
  65   bool canFoldMemoryOperand(const MachineInstr *MI,
  66                                     const SmallVectorImpl<unsigned> &Ops) const;
  67
  68   MachineInstr* foldMemoryOperandImpl(MachineFunction &MF,
  69                                       MachineInstr* MI,
  70                                       const SmallVectorImpl<unsigned> &Ops,
  71                                       int FrameIndex) const;
  72
  73   MachineInstr* foldMemoryOperandImpl(MachineFunction &MF,
  74                                       MachineInstr* MI,
  75                                       const SmallVectorImpl<unsigned> &Ops,
  76                                       MachineInstr* LoadMI) const {
  77     return 0;
  78   }
  79 };
  80 }
  81
  82 #endif // THUMB1INSTRUCTIONINFO_H