lib/Target/PowerPC/PPCRegisterInfo.h

   1 //===- PPCRegisterInfo.h - PowerPC 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 PowerPC implementation of the MRegisterInfo class.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #ifndef POWERPC32_REGISTERINFO_H
  15 #define POWERPC32_REGISTERINFO_H
  16
  17 #include "PPC.h"
  18 #include "PPCGenRegisterInfo.h.inc"
  19 #include <map>
  20
  21 namespace llvm {
  22 class PPCSubtarget;
  23 class TargetInstrInfo;
  24 class Type;
  25
  26 class PPCRegisterInfo : public PPCGenRegisterInfo {
  27   std::map<unsigned, unsigned> ImmToIdxMap;
  28   const PPCSubtarget &Subtarget;
  29   const TargetInstrInfo &TII;
  30 public:
  31   PPCRegisterInfo(const PPCSubtarget &SubTarget, const TargetInstrInfo &tii);
  32
  33   /// getRegisterNumbering - Given the enum value for some register, e.g.
  34   /// PPC::F14, return the number that it corresponds to (e.g. 14).
  35   static unsigned getRegisterNumbering(unsigned RegEnum);
  36
  37   /// Code Generation virtual methods...
  38   void reMaterialize(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
  39                      unsigned DestReg, const MachineInstr *Orig) const;
  40
  41   const unsigned *getCalleeSavedRegs(const MachineFunction* MF = 0) const;
  42
  43   const TargetRegisterClass* const*
  44   getCalleeSavedRegClasses(const MachineFunction *MF = 0) const;
  45
  46   BitVector getReservedRegs(const MachineFunction &MF) const;
  47
  48   /// targetHandlesStackFrameRounding - Returns true if the target is
  49   /// responsible for rounding up the stack frame (probably at emitPrologue
  50   /// time).
  51   bool targetHandlesStackFrameRounding() const { return true; }
  52
  53   bool hasFP(const MachineFunction &MF) const;
  54
  55   void eliminateCallFramePseudoInstr(MachineFunction &MF,
  56                                      MachineBasicBlock &MBB,
  57                                      MachineBasicBlock::iterator I) const;
  58
  59   void lowerDynamicAlloc(MachineBasicBlock::iterator II) const;
  60   void eliminateFrameIndex(MachineBasicBlock::iterator II,
  61                            int SPAdj, RegScavenger *RS = NULL) const;
  62
  63   /// determineFrameLayout - Determine the size of the frame and maximum call
  64   /// frame size.
  65   void determineFrameLayout(MachineFunction &MF) const;
  66
  67   void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
  68                                             RegScavenger *RS = NULL) const;
  69   void emitPrologue(MachineFunction &MF) const;
  70   void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
  71
  72   // Debug information queries.
  73   unsigned getRARegister() const;
  74   unsigned getFrameRegister(MachineFunction &MF) const;
  75   void getInitialFrameState(std::vector<MachineMove> &Moves) const;
  76
  77   // Exception handling queries.
  78   unsigned getEHExceptionRegister() const;
  79   unsigned getEHHandlerRegister() const;
  80
  81   int getDwarfRegNum(unsigned RegNum, bool isEH) const;
  82 };
  83
  84 } // end namespace llvm
  85
  86 #endif