lib/Target/CellSPU/SPURegisterInfo.h

   1 //===- SPURegisterInfo.h - Cell SPU 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 Cell SPU implementation of the TargetRegisterInfo
  11 // class.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #ifndef SPU_REGISTERINFO_H
  16 #define SPU_REGISTERINFO_H
  17
  18 #include "SPU.h"
  19 #include "SPUGenRegisterInfo.h.inc"
  20
  21 namespace llvm {
  22   class SPUSubtarget;
  23   class TargetInstrInfo;
  24   class Type;
  25
  26   class SPURegisterInfo : public SPUGenRegisterInfo {
  27   private:
  28     const SPUSubtarget &Subtarget;
  29     const TargetInstrInfo &TII;
  30
  31     //! Predicate: Does the machine function use the link register?
  32     bool usesLR(MachineFunction &MF) const;
  33
  34   public:
  35     SPURegisterInfo(const SPUSubtarget &subtarget, const TargetInstrInfo &tii);
  36
  37     //! Translate a register's enum value to a register number
  38     /*!
  39       This method translates a register's enum value to it's regiser number,
  40       e.g. SPU::R14 -> 14.
  41      */
  42     static unsigned getRegisterNumbering(unsigned RegEnum);
  43
  44     /// getPointerRegClass - Return the register class to use to hold pointers.
  45     /// This is used for addressing modes.
  46     virtual const TargetRegisterClass *getPointerRegClass() const;
  47
  48     //! Return the array of callee-saved registers
  49     virtual const unsigned* getCalleeSavedRegs(const MachineFunction *MF) const;
  50
  51     //! Return the register class array of the callee-saved registers
  52     virtual const TargetRegisterClass* const *
  53       getCalleeSavedRegClasses(const MachineFunction *MF) const;
  54
  55     //! Return the reserved registers
  56     BitVector getReservedRegs(const MachineFunction &MF) const;
  57
  58     //! Prediate: Target has dedicated frame pointer
  59     bool hasFP(const MachineFunction &MF) const;
  60     //! Eliminate the call frame setup pseudo-instructions
  61     void eliminateCallFramePseudoInstr(MachineFunction &MF,
  62                                        MachineBasicBlock &MBB,
  63                                        MachineBasicBlock::iterator I) const;
  64     //! Convert frame indicies into machine operands
  65     void eliminateFrameIndex(MachineBasicBlock::iterator II, int,
  66                              RegScavenger *RS) const;
  67     //! Determine the frame's layour
  68     void determineFrameLayout(MachineFunction &MF) const;
  69
  70     void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
  71                                               RegScavenger *RS = NULL) const;
  72     //! Emit the function prologue
  73     void emitPrologue(MachineFunction &MF) const;
  74     //! Emit the function epilogue
  75     void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
  76     //! Get return address register (LR, aka R0)
  77     unsigned getRARegister() const;
  78     //! Get the stack frame register (SP, aka R1)
  79     unsigned getFrameRegister(MachineFunction &MF) const;
  80     //! Perform target-specific stack frame setup.
  81     void getInitialFrameState(std::vector<MachineMove> &Moves) const;
  82
  83     //------------------------------------------------------------------------
  84     // New methods added:
  85     //------------------------------------------------------------------------
  86
  87     //! Return the array of argument passing registers
  88     /*!
  89       \note The size of this array is returned by getArgRegsSize().
  90      */
  91     static const unsigned *getArgRegs();
  92
  93     //! Return the size of the argument passing register array
  94     static unsigned getNumArgRegs();
  95
  96     //! Get DWARF debugging register number
  97     int getDwarfRegNum(unsigned RegNum, bool isEH) const;
  98   };
  99 } // end namespace llvm
 100
 101 #endif