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 #include "MBlazeGenRegisterInfo.h.inc"
  21
  22 namespace llvm {
  23 class MBlazeSubtarget;
  24 class TargetInstrInfo;
  25 class Type;
  26
  27 namespace MBlaze {
  28   /// SubregIndex - The index of various sized subregister classes. Note that
  29   /// these indices must be kept in sync with the class indices in the
  30   /// MBlazeRegisterInfo.td file.
  31   enum SubregIndex {
  32     SUBREG_FPEVEN = 1, SUBREG_FPODD = 2
  33   };
  34 }
  35
  36 struct MBlazeRegisterInfo : public MBlazeGenRegisterInfo {
  37   const MBlazeSubtarget &Subtarget;
  38   const TargetInstrInfo &TII;
  39
  40   MBlazeRegisterInfo(const MBlazeSubtarget &Subtarget,
  41                      const TargetInstrInfo &tii);
  42
  43   /// getRegisterNumbering - Given the enum value for some register, e.g.
  44   /// MBlaze::RA, return the number that it corresponds to (e.g. 31).
  45   static unsigned getRegisterNumbering(unsigned RegEnum);
  46   static unsigned getRegisterFromNumbering(unsigned RegEnum);
  47
  48   /// Get PIC indirect call register
  49   static unsigned getPICCallReg();
  50
  51   /// Adjust the MBlaze stack frame.
  52   void adjustMBlazeStackFrame(MachineFunction &MF) const;
  53
  54   /// Code Generation virtual methods...
  55   const unsigned *getCalleeSavedRegs(const MachineFunction* MF = 0) const;
  56
  57   BitVector getReservedRegs(const MachineFunction &MF) const;
  58
  59   bool hasFP(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   void emitPrologue(MachineFunction &MF) const;
  72   void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
  73
  74   /// Debug information queries.
  75   unsigned getRARegister() const;
  76   unsigned getFrameRegister(const MachineFunction &MF) const;
  77
  78   /// Exception handling queries.
  79   unsigned getEHExceptionRegister() const;
  80   unsigned getEHHandlerRegister() const;
  81
  82   /// targetHandlesStackFrameRounding - Returns true if the target is
  83   /// responsible for rounding up the stack frame (probably at emitPrologue
  84   /// time).
  85   bool targetHandlesStackFrameRounding() const { return true; }
  86
  87   int getDwarfRegNum(unsigned RegNum, bool isEH) const;
  88 };
  89
  90 } // end namespace llvm
  91
  92 #endif