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 *
  47     getPointerRegClass(unsigned Kind = 0) const;
  48
  49     //! Return the array of callee-saved registers
  50     virtual const unsigned* getCalleeSavedRegs(const MachineFunction *MF) const;
  51
  52     //! Return the register class array of the callee-saved registers
  53     virtual const TargetRegisterClass* const *
  54       getCalleeSavedRegClasses(const MachineFunction *MF) const;
  55
  56     //! Return the reserved registers
  57     BitVector getReservedRegs(const MachineFunction &MF) const;
  58
  59     //! Prediate: Target has dedicated frame pointer
  60     bool hasFP(const MachineFunction &MF) const;
  61     //! Eliminate the call frame setup pseudo-instructions
  62     void eliminateCallFramePseudoInstr(MachineFunction &MF,
  63                                        MachineBasicBlock &MBB,
  64                                        MachineBasicBlock::iterator I) const;
  65     //! Convert frame indicies into machine operands
  66     void eliminateFrameIndex(MachineBasicBlock::iterator II, int,
  67                              RegScavenger *RS) const;
  68     //! Determine the frame's layour
  69     void determineFrameLayout(MachineFunction &MF) const;
  70
  71     void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
  72                                               RegScavenger *RS = NULL) const;
  73     //! Emit the function prologue
  74     void emitPrologue(MachineFunction &MF) const;
  75     //! Emit the function epilogue
  76     void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
  77     //! Get return address register (LR, aka R0)
  78     unsigned getRARegister() const;
  79     //! Get the stack frame register (SP, aka R1)
  80     unsigned getFrameRegister(MachineFunction &MF) const;
  81     //! Perform target-specific stack frame setup.
  82     void getInitialFrameState(std::vector<MachineMove> &Moves) const;
  83
  84     //------------------------------------------------------------------------
  85     // New methods added:
  86     //------------------------------------------------------------------------
  87
  88     //! Return the array of argument passing registers
  89     /*!
  90       \note The size of this array is returned by getArgRegsSize().
  91      */
  92     static const unsigned *getArgRegs();
  93
  94     //! Return the size of the argument passing register array
  95     static unsigned getNumArgRegs();
  96
  97     //! Get DWARF debugging register number
  98     int getDwarfRegNum(unsigned RegNum, bool isEH) const;
  99   };
 100 } // end namespace llvm
 101
 102 #endif