lib/Target/MBlaze/MBlazeRegisterInfo.h

   1 //===- MBlazeRegisterInfo.h - MBlaze Register Information Impl --*- 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 MBlaze implementation of the TargetRegisterInfo
  11 // class.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #ifndef MBLAZEREGISTERINFO_H
  16 #define MBLAZEREGISTERINFO_H
  17
  18 #include "MBlaze.h"
  19 #include "llvm/Target/TargetRegisterInfo.h"
  20
  21 #define GET_REGINFO_HEADER
  22 #include "MBlazeGenRegisterInfo.inc"
  23
  24 namespace llvm {
  25 class MBlazeSubtarget;
  26 class TargetInstrInfo;
  27 class Type;
  28
  29 namespace MBlaze {
  30   /// SubregIndex - The index of various sized subregister classes. Note that
  31   /// these indices must be kept in sync with the class indices in the
  32   /// MBlazeRegisterInfo.td file.
  33   enum SubregIndex {
  34     SUBREG_FPEVEN = 1, SUBREG_FPODD = 2
  35   };
  36 }
  37
  38 struct MBlazeRegisterInfo : public MBlazeGenRegisterInfo {
  39   const MBlazeSubtarget &Subtarget;
  40   const TargetInstrInfo &TII;
  41
  42   MBlazeRegisterInfo(const MBlazeSubtarget &Subtarget,
  43                      const TargetInstrInfo &tii);
  44
  45   /// getRegisterNumbering - Given the enum value for some register, e.g.
  46   /// MBlaze::RA, return the number that it corresponds to (e.g. 31).
  47   static unsigned getRegisterNumbering(unsigned RegEnum);
  48   static unsigned getRegisterFromNumbering(unsigned RegEnum);
  49   static unsigned getSpecialRegisterFromNumbering(unsigned RegEnum);
  50   static bool isRegister(unsigned RegEnum);
  51   static bool isSpecialRegister(unsigned RegEnum);
  52
  53   /// Get PIC indirect call register
  54   static unsigned getPICCallReg();
  55
  56   /// Code Generation virtual methods...
  57   const unsigned *getCalleeSavedRegs(const MachineFunction* MF = 0) const;
  58
  59   BitVector getReservedRegs(const MachineFunction &MF) const;
  60
  61   void eliminateCallFramePseudoInstr(MachineFunction &MF,
  62                                      MachineBasicBlock &MBB,
  63                                      MachineBasicBlock::iterator I) const;
  64
  65   /// Stack Frame Processing Methods
  66   void eliminateFrameIndex(MachineBasicBlock::iterator II,
  67                            int SPAdj, RegScavenger *RS = NULL) const;
  68
  69   void processFunctionBeforeFrameFinalized(MachineFunction &MF) const;
  70
  71   /// Debug information queries.
  72   unsigned getRARegister() const;
  73   unsigned getFrameRegister(const MachineFunction &MF) const;
  74
  75   /// Exception handling queries.
  76   unsigned getEHExceptionRegister() const;
  77   unsigned getEHHandlerRegister() const;
  78
  79   int getDwarfRegNum(unsigned RegNum, bool isEH) const;
  80   int getLLVMRegNum(unsigned RegNum, bool isEH) const;
  81 };
  82
  83 } // end namespace llvm
  84
  85 #endif