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"
23 class TargetInstrInfo;
26 class PPCRegisterInfo : public PPCGenRegisterInfo {
27 std::map<unsigned, unsigned> ImmToIdxMap;
28 const PPCSubtarget &Subtarget;
29 const TargetInstrInfo &TII;
31 PPCRegisterInfo(const PPCSubtarget &SubTarget, const TargetInstrInfo &tii);
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);
37 /// Code Generation virtual methods...
38 void storeRegToStackSlot(MachineBasicBlock &MBB,
39 MachineBasicBlock::iterator MBBI,
40 unsigned SrcReg, int FrameIndex,
41 const TargetRegisterClass *RC) const;
43 void loadRegFromStackSlot(MachineBasicBlock &MBB,
44 MachineBasicBlock::iterator MBBI,
45 unsigned DestReg, int FrameIndex,
46 const TargetRegisterClass *RC) const;
48 void copyRegToReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI,
49 unsigned DestReg, unsigned SrcReg,
50 const TargetRegisterClass *RC) const;
52 void reMaterialize(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
53 unsigned DestReg, const MachineInstr *Orig) const;
55 /// foldMemoryOperand - PowerPC (like most RISC's) can only fold spills into
56 /// copy instructions, turning them into load/store instructions.
57 virtual MachineInstr* foldMemoryOperand(MachineInstr* MI, unsigned OpNum,
58 int FrameIndex) const;
60 virtual MachineInstr* foldMemoryOperand(MachineInstr* MI, unsigned OpNum,
61 MachineInstr* LoadMI) const {
65 const unsigned *getCalleeSavedRegs(const MachineFunction* MF = 0) const;
67 const TargetRegisterClass* const*
68 getCalleeSavedRegClasses(const MachineFunction *MF = 0) const;
70 BitVector getReservedRegs(const MachineFunction &MF) const;
72 /// targetHandlesStackFrameRounding - Returns true if the target is
73 /// responsible for rounding up the stack frame (probably at emitPrologue
75 bool targetHandlesStackFrameRounding() const { return true; }
77 bool hasFP(const MachineFunction &MF) const;
79 void eliminateCallFramePseudoInstr(MachineFunction &MF,
80 MachineBasicBlock &MBB,
81 MachineBasicBlock::iterator I) const;
83 /// usesLR - Returns if the link registers (LR) has been used in the function.
85 bool usesLR(MachineFunction &MF) const;
87 void lowerDynamicAlloc(MachineBasicBlock::iterator II) const;
88 void eliminateFrameIndex(MachineBasicBlock::iterator II,
89 int SPAdj, RegScavenger *RS = NULL) const;
91 /// determineFrameLayout - Determine the size of the frame and maximum call
93 void determineFrameLayout(MachineFunction &MF) const;
95 void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
96 RegScavenger *RS = NULL) const;
97 void emitPrologue(MachineFunction &MF) const;
98 void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
100 // Debug information queries.
101 unsigned getRARegister() const;
102 unsigned getFrameRegister(MachineFunction &MF) const;
103 void getInitialFrameState(std::vector<MachineMove> &Moves) const;
105 // Exception handling queries.
106 unsigned getEHExceptionRegister() const;
107 unsigned getEHHandlerRegister() const;
110 } // end namespace llvm