1 //===- PPCRegisterInfo.h - PowerPC 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 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 reMaterialize(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
39 unsigned DestReg, const MachineInstr *Orig) const;
41 /// foldMemoryOperand - PowerPC (like most RISC's) can only fold spills into
42 /// copy instructions, turning them into load/store instructions.
43 virtual MachineInstr* foldMemoryOperand(MachineInstr* MI,
44 SmallVectorImpl<unsigned> &Ops,
45 int FrameIndex) const;
47 virtual MachineInstr* foldMemoryOperand(MachineInstr* MI,
48 SmallVectorImpl<unsigned> &Ops,
49 MachineInstr* LoadMI) const {
53 virtual bool canFoldMemoryOperand(MachineInstr *MI,
54 SmallVectorImpl<unsigned> &Ops) const;
56 const unsigned *getCalleeSavedRegs(const MachineFunction* MF = 0) const;
58 const TargetRegisterClass* const*
59 getCalleeSavedRegClasses(const MachineFunction *MF = 0) const;
61 BitVector getReservedRegs(const MachineFunction &MF) const;
63 /// targetHandlesStackFrameRounding - Returns true if the target is
64 /// responsible for rounding up the stack frame (probably at emitPrologue
66 bool targetHandlesStackFrameRounding() const { return true; }
68 bool hasFP(const MachineFunction &MF) const;
70 void eliminateCallFramePseudoInstr(MachineFunction &MF,
71 MachineBasicBlock &MBB,
72 MachineBasicBlock::iterator I) const;
74 void lowerDynamicAlloc(MachineBasicBlock::iterator II) const;
75 void eliminateFrameIndex(MachineBasicBlock::iterator II,
76 int SPAdj, RegScavenger *RS = NULL) const;
78 /// determineFrameLayout - Determine the size of the frame and maximum call
80 void determineFrameLayout(MachineFunction &MF) const;
82 void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
83 RegScavenger *RS = NULL) const;
84 void emitPrologue(MachineFunction &MF) const;
85 void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
87 // Debug information queries.
88 unsigned getRARegister() const;
89 unsigned getFrameRegister(MachineFunction &MF) const;
90 void getInitialFrameState(std::vector<MachineMove> &Moves) const;
92 // Exception handling queries.
93 unsigned getEHExceptionRegister() const;
94 unsigned getEHHandlerRegister() const;
96 int getDwarfRegNum(unsigned RegNum, bool isEH) const;
99 } // end namespace llvm