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 /// getPointerRegClass - Return the register class to use to hold pointers.
39 /// This is used for addressing modes.
40 virtual const TargetRegisterClass *getPointerRegClass(unsigned Kind=0) const;
42 /// Code Generation virtual methods...
43 const unsigned *getCalleeSavedRegs(const MachineFunction* MF = 0) const;
45 BitVector getReservedRegs(const MachineFunction &MF) const;
47 /// targetHandlesStackFrameRounding - Returns true if the target is
48 /// responsible for rounding up the stack frame (probably at emitPrologue
50 bool targetHandlesStackFrameRounding() const { return true; }
52 /// requiresRegisterScavenging - We require a register scavenger.
53 /// FIXME (64-bit): Should be inlined.
54 bool requiresRegisterScavenging(const MachineFunction &MF) const;
56 bool hasFP(const MachineFunction &MF) const;
58 void eliminateCallFramePseudoInstr(MachineFunction &MF,
59 MachineBasicBlock &MBB,
60 MachineBasicBlock::iterator I) const;
62 void lowerDynamicAlloc(MachineBasicBlock::iterator II,
63 int SPAdj, RegScavenger *RS) const;
64 void lowerCRSpilling(MachineBasicBlock::iterator II, unsigned FrameIndex,
65 int SPAdj, RegScavenger *RS) const;
66 void eliminateFrameIndex(MachineBasicBlock::iterator II,
67 int SPAdj, RegScavenger *RS = NULL) const;
69 /// determineFrameLayout - Determine the size of the frame and maximum call
71 void determineFrameLayout(MachineFunction &MF) const;
73 void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
74 RegScavenger *RS = NULL) const;
75 void processFunctionBeforeFrameFinalized(MachineFunction &MF) const;
77 void emitPrologue(MachineFunction &MF) const;
78 void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
80 // Debug information queries.
81 unsigned getRARegister() const;
82 unsigned getFrameRegister(const MachineFunction &MF) const;
83 void getInitialFrameState(std::vector<MachineMove> &Moves) const;
85 // Exception handling queries.
86 unsigned getEHExceptionRegister() const;
87 unsigned getEHHandlerRegister() const;
89 int getDwarfRegNum(unsigned RegNum, bool isEH) const;
92 } // end namespace llvm