lib/Target/ARM/ARMRegisterInfo.h

   1 //===- ARMRegisterInfo.h - ARM Register Information Impl --------*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file was developed by the "Instituto Nokia de Tecnologia" and
   6 // is distributed under the University of Illinois Open Source
   7 // License. See LICENSE.TXT for details.
   8 //
   9 //===----------------------------------------------------------------------===//
  10 //
  11 // This file contains the ARM implementation of the MRegisterInfo class.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #ifndef ARMREGISTERINFO_H
  16 #define ARMREGISTERINFO_H
  17
  18 #include "llvm/Target/MRegisterInfo.h"
  19 #include "ARMGenRegisterInfo.h.inc"
  20 #include <set>
  21
  22 namespace llvm {
  23   class TargetInstrInfo;
  24   class ARMSubtarget;
  25   class Type;
  26
  27 struct ARMRegisterInfo : public ARMGenRegisterInfo {
  28   const TargetInstrInfo &TII;
  29   const ARMSubtarget &STI;
  30 private:
  31   /// FramePtr - ARM physical register used as frame ptr.
  32   unsigned FramePtr;
  33
  34 public:
  35   ARMRegisterInfo(const TargetInstrInfo &tii, const ARMSubtarget &STI);
  36
  37   /// getRegisterNumbering - Given the enum value for some register, e.g.
  38   /// ARM::LR, return the number that it corresponds to (e.g. 14).
  39   static unsigned getRegisterNumbering(unsigned RegEnum);
  40
  41   /// Code Generation virtual methods...
  42   bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
  43                                  MachineBasicBlock::iterator MI,
  44                                  const std::vector<CalleeSavedInfo> &CSI) const;
  45
  46   bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
  47                                    MachineBasicBlock::iterator MI,
  48                                  const std::vector<CalleeSavedInfo> &CSI) const;
  49
  50   void storeRegToStackSlot(MachineBasicBlock &MBB,
  51                            MachineBasicBlock::iterator MBBI,
  52                            unsigned SrcReg, int FrameIndex,
  53                            const TargetRegisterClass *RC) const;
  54
  55   void loadRegFromStackSlot(MachineBasicBlock &MBB,
  56                             MachineBasicBlock::iterator MBBI,
  57                             unsigned DestReg, int FrameIndex,
  58                             const TargetRegisterClass *RC) const;
  59
  60   void copyRegToReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI,
  61                     unsigned DestReg, unsigned SrcReg,
  62                     const TargetRegisterClass *RC) const;
  63
  64   MachineInstr* foldMemoryOperand(MachineInstr* MI, unsigned OpNum,
  65                                   int FrameIndex) const;
  66
  67   const unsigned *getCalleeSavedRegs() const;
  68
  69   const TargetRegisterClass* const* getCalleeSavedRegClasses() const;
  70
  71   void eliminateCallFramePseudoInstr(MachineFunction &MF,
  72                                      MachineBasicBlock &MBB,
  73                                      MachineBasicBlock::iterator I) const;
  74
  75   void eliminateFrameIndex(MachineBasicBlock::iterator II) const;
  76
  77   void processFunctionBeforeCalleeSavedScan(MachineFunction &MF) const;
  78
  79   void emitPrologue(MachineFunction &MF) const;
  80   void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
  81
  82   // Debug information queries.
  83   unsigned getRARegister() const;
  84   unsigned getFrameRegister(MachineFunction &MF) const;
  85 };
  86
  87 } // end namespace llvm
  88
  89 #endif