1 //===- PPCRegisterInfo.h - PowerPC Register Information Impl -----*- C++ -*-==//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains the PowerPC implementation of the MRegisterInfo class.
12 //===----------------------------------------------------------------------===//
14 #ifndef POWERPC32_REGISTERINFO_H
15 #define POWERPC32_REGISTERINFO_H
18 #include "PPCGenRegisterInfo.h.inc"
25 class PPCRegisterInfo : public PPCGenRegisterInfo {
26 std::map<unsigned, unsigned> ImmToIdxMap;
27 const PPCSubtarget &Subtarget;
29 PPCRegisterInfo(const PPCSubtarget &SubTarget);
31 /// getRegisterNumbering - Given the enum value for some register, e.g.
32 /// PPC::F14, return the number that it corresponds to (e.g. 14).
33 static unsigned getRegisterNumbering(unsigned RegEnum);
35 /// Code Generation virtual methods...
36 void storeRegToStackSlot(MachineBasicBlock &MBB,
37 MachineBasicBlock::iterator MBBI,
38 unsigned SrcReg, int FrameIndex,
39 const TargetRegisterClass *RC) const;
41 void loadRegFromStackSlot(MachineBasicBlock &MBB,
42 MachineBasicBlock::iterator MBBI,
43 unsigned DestReg, int FrameIndex,
44 const TargetRegisterClass *RC) const;
46 void copyRegToReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI,
47 unsigned DestReg, unsigned SrcReg,
48 const TargetRegisterClass *RC) const;
50 /// foldMemoryOperand - PowerPC (like most RISC's) can only fold spills into
51 /// copy instructions, turning them into load/store instructions.
52 virtual MachineInstr* foldMemoryOperand(MachineInstr* MI, unsigned OpNum,
53 int FrameIndex) const;
55 const unsigned *getCalleeSaveRegs() const;
57 const TargetRegisterClass* const* getCalleeSaveRegClasses() const;
59 void eliminateCallFramePseudoInstr(MachineFunction &MF,
60 MachineBasicBlock &MBB,
61 MachineBasicBlock::iterator I) const;
63 void eliminateFrameIndex(MachineBasicBlock::iterator II) const;
65 void emitPrologue(MachineFunction &MF) const;
66 void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
68 // Debug information queries.
69 unsigned getRARegister() const;
70 unsigned getFrameRegister(MachineFunction &MF) const;
71 void getInitialFrameState(std::vector<MachineMove *> &Moves) const;
74 } // end namespace llvm