lib/Target/Blackfin/BlackfinRegisterInfo.h

   1 //===- BlackfinRegisterInfo.h - Blackfin Register 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 Blackfin implementation of the TargetRegisterInfo
  11 // class.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #ifndef BLACKFINREGISTERINFO_H
  16 #define BLACKFINREGISTERINFO_H
  17
  18 #include "llvm/Target/TargetRegisterInfo.h"
  19 #include "BlackfinGenRegisterInfo.h.inc"
  20
  21 namespace llvm {
  22
  23   class BlackfinSubtarget;
  24   class TargetInstrInfo;
  25   class Type;
  26
  27   struct BlackfinRegisterInfo : public BlackfinGenRegisterInfo {
  28     BlackfinSubtarget &Subtarget;
  29     const TargetInstrInfo &TII;
  30
  31     BlackfinRegisterInfo(BlackfinSubtarget &st, const TargetInstrInfo &tii);
  32
  33     /// Code Generation virtual methods...
  34     const unsigned *getCalleeSavedRegs(const MachineFunction *MF = 0) const;
  35
  36     BitVector getReservedRegs(const MachineFunction &MF) const;
  37
  38     // getSubReg implemented by tablegen
  39
  40     const TargetRegisterClass *getPointerRegClass(unsigned Kind = 0) const {
  41       return &BF::PRegClass;
  42     }
  43
  44     bool hasFP(const MachineFunction &MF) const;
  45
  46     // bool hasReservedCallFrame(MachineFunction &MF) const;
  47
  48     bool requiresRegisterScavenging(const MachineFunction &MF) const;
  49
  50     void eliminateCallFramePseudoInstr(MachineFunction &MF,
  51                                        MachineBasicBlock &MBB,
  52                                        MachineBasicBlock::iterator I) const;
  53
  54     void eliminateFrameIndex(MachineBasicBlock::iterator II,
  55                              int SPAdj, RegScavenger *RS = NULL) const;
  56
  57     void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
  58                                               RegScavenger *RS) const;
  59
  60     void emitPrologue(MachineFunction &MF) const;
  61     void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
  62
  63     unsigned getFrameRegister(const MachineFunction &MF) const;
  64     unsigned getRARegister() const;
  65
  66     // Exception handling queries.
  67     unsigned getEHExceptionRegister() const;
  68     unsigned getEHHandlerRegister() const;
  69
  70     int getDwarfRegNum(unsigned RegNum, bool isEH) const;
  71
  72     // Utility functions
  73     void adjustRegister(MachineBasicBlock &MBB,
  74                         MachineBasicBlock::iterator I,
  75                         DebugLoc DL,
  76                         unsigned Reg,
  77                         unsigned ScratchReg,
  78                         int delta) const;
  79     void loadConstant(MachineBasicBlock &MBB,
  80                       MachineBasicBlock::iterator I,
  81                       DebugLoc DL,
  82                       unsigned Reg,
  83                       int value) const;
  84   };
  85
  86 } // end namespace llvm
  87
  88 #endif