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 const unsigned *getCalleeSavedRegs(const MachineFunction* MF = 0) const;
41 const TargetRegisterClass* const*
42 getCalleeSavedRegClasses(const MachineFunction *MF = 0) const;
44 BitVector getReservedRegs(const MachineFunction &MF) const;
46 /// targetHandlesStackFrameRounding - Returns true if the target is
47 /// responsible for rounding up the stack frame (probably at emitPrologue
49 bool targetHandlesStackFrameRounding() const { return true; }
51 /// requiresRegisterScavenging - We require a register scavenger.
52 /// FIXME (64-bit): Should be inlined.
53 bool requiresRegisterScavenging(const MachineFunction &MF) const;
55 bool hasFP(const MachineFunction &MF) const;
57 void eliminateCallFramePseudoInstr(MachineFunction &MF,
58 MachineBasicBlock &MBB,
59 MachineBasicBlock::iterator I) const;
61 void lowerDynamicAlloc(MachineBasicBlock::iterator II,
62 int SPAdj, RegScavenger *RS) const;
63 void lowerCRSpilling(MachineBasicBlock::iterator II, unsigned FrameIndex,
64 int SPAdj, RegScavenger *RS) const;
65 void eliminateFrameIndex(MachineBasicBlock::iterator II,
66 int SPAdj, RegScavenger *RS = NULL) const;
68 /// determineFrameLayout - Determine the size of the frame and maximum call
70 void determineFrameLayout(MachineFunction &MF) const;
72 void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
73 RegScavenger *RS = NULL) const;
74 void emitPrologue(MachineFunction &MF) const;
75 void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
77 // Debug information queries.
78 unsigned getRARegister() const;
79 unsigned getFrameRegister(MachineFunction &MF) const;
80 void getInitialFrameState(std::vector<MachineMove> &Moves) const;
82 // Exception handling queries.
83 unsigned getEHExceptionRegister() const;
84 unsigned getEHHandlerRegister() const;
86 int getDwarfRegNum(unsigned RegNum, bool isEH) const;
89 } // end namespace llvm