1 //===- SPURegisterInfo.h - Cell SPU Register Information Impl ----*- C++ -*-==//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains the Cell SPU implementation of the TargetRegisterInfo
13 //===----------------------------------------------------------------------===//
15 #ifndef SPU_REGISTERINFO_H
16 #define SPU_REGISTERINFO_H
19 #include "SPUGenRegisterInfo.h.inc"
23 class TargetInstrInfo;
26 class SPURegisterInfo : public SPUGenRegisterInfo {
28 const SPUSubtarget &Subtarget;
29 const TargetInstrInfo &TII;
31 //! Predicate: Does the machine function use the link register?
32 bool usesLR(MachineFunction &MF) const;
35 SPURegisterInfo(const SPUSubtarget &subtarget, const TargetInstrInfo &tii);
37 //! Translate a register's enum value to a register number
39 This method translates a register's enum value to it's regiser number,
42 static unsigned getRegisterNumbering(unsigned RegEnum);
44 //! Return the array of callee-saved registers
45 virtual const unsigned* getCalleeSavedRegs(const MachineFunction *MF) const;
47 //! Return the register class array of the callee-saved registers
48 virtual const TargetRegisterClass* const *
49 getCalleeSavedRegClasses(const MachineFunction *MF) const;
51 //! Return the reserved registers
52 BitVector getReservedRegs(const MachineFunction &MF) const;
54 //! Prediate: Target has dedicated frame pointer
55 bool hasFP(const MachineFunction &MF) const;
56 //! Eliminate the call frame setup pseudo-instructions
57 void eliminateCallFramePseudoInstr(MachineFunction &MF,
58 MachineBasicBlock &MBB,
59 MachineBasicBlock::iterator I) const;
60 //! Convert frame indicies into machine operands
61 void eliminateFrameIndex(MachineBasicBlock::iterator II, int,
62 RegScavenger *RS) const;
63 //! Determine the frame's layour
64 void determineFrameLayout(MachineFunction &MF) const;
66 void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
67 RegScavenger *RS = NULL) const;
68 //! Emit the function prologue
69 void emitPrologue(MachineFunction &MF) const;
70 //! Emit the function epilogue
71 void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
72 //! Get return address register (LR, aka R0)
73 unsigned getRARegister() const;
74 //! Get the stack frame register (SP, aka R1)
75 unsigned getFrameRegister(MachineFunction &MF) const;
76 //! Perform target-specific stack frame setup.
77 void getInitialFrameState(std::vector<MachineMove> &Moves) const;
79 //------------------------------------------------------------------------
81 //------------------------------------------------------------------------
83 //! Return the array of argument passing registers
85 \note The size of this array is returned by getArgRegsSize().
87 static const unsigned *getArgRegs();
89 //! Return the size of the argument passing register array
90 static unsigned getNumArgRegs();
92 //! Get DWARF debugging register number
93 int getDwarfRegNum(unsigned RegNum, bool isEH) const;
95 } // end namespace llvm