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 TargetRegisterInfo
13 //===----------------------------------------------------------------------===//
15 #ifndef POWERPC32_REGISTERINFO_H
16 #define POWERPC32_REGISTERINFO_H
19 #include "PPCGenRegisterInfo.h.inc"
24 class TargetInstrInfo;
27 class PPCRegisterInfo : public PPCGenRegisterInfo {
28 std::map<unsigned, unsigned> ImmToIdxMap;
29 const PPCSubtarget &Subtarget;
30 const TargetInstrInfo &TII;
32 PPCRegisterInfo(const PPCSubtarget &SubTarget, const TargetInstrInfo &tii);
34 /// getRegisterNumbering - Given the enum value for some register, e.g.
35 /// PPC::F14, return the number that it corresponds to (e.g. 14).
36 static unsigned getRegisterNumbering(unsigned RegEnum);
38 /// Code Generation virtual methods...
39 void reMaterialize(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
40 unsigned DestReg, const MachineInstr *Orig) const;
42 const unsigned *getCalleeSavedRegs(const MachineFunction* MF = 0) const;
44 const TargetRegisterClass* const*
45 getCalleeSavedRegClasses(const MachineFunction *MF = 0) const;
47 BitVector getReservedRegs(const MachineFunction &MF) const;
49 /// targetHandlesStackFrameRounding - Returns true if the target is
50 /// responsible for rounding up the stack frame (probably at emitPrologue
52 bool targetHandlesStackFrameRounding() const { return true; }
54 bool hasFP(const MachineFunction &MF) const;
56 void eliminateCallFramePseudoInstr(MachineFunction &MF,
57 MachineBasicBlock &MBB,
58 MachineBasicBlock::iterator I) const;
60 void lowerDynamicAlloc(MachineBasicBlock::iterator II) const;
61 void eliminateFrameIndex(MachineBasicBlock::iterator II,
62 int SPAdj, RegScavenger *RS = NULL) const;
64 /// determineFrameLayout - Determine the size of the frame and maximum call
66 void determineFrameLayout(MachineFunction &MF) const;
68 void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
69 RegScavenger *RS = NULL) const;
70 void emitPrologue(MachineFunction &MF) const;
71 void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
73 // Debug information queries.
74 unsigned getRARegister() const;
75 unsigned getFrameRegister(MachineFunction &MF) const;
76 void getInitialFrameState(std::vector<MachineMove> &Moves) const;
78 // Exception handling queries.
79 unsigned getEHExceptionRegister() const;
80 unsigned getEHHandlerRegister() const;
82 int getDwarfRegNum(unsigned RegNum, bool isEH) const;
85 } // end namespace llvm