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
21 #define GET_REGINFO_HEADER
22 #include "PPCGenRegisterInfo.inc"
26 class TargetInstrInfo;
29 class PPCRegisterInfo : public PPCGenRegisterInfo {
30 std::map<unsigned, unsigned> ImmToIdxMap;
31 const PPCSubtarget &Subtarget;
32 const TargetInstrInfo &TII;
34 PPCRegisterInfo(const PPCSubtarget &SubTarget, const TargetInstrInfo &tii);
36 /// getPointerRegClass - Return the register class to use to hold pointers.
37 /// This is used for addressing modes.
38 virtual const TargetRegisterClass *
39 getPointerRegClass(const MachineFunction &MF, unsigned Kind=0) const;
41 unsigned getRegPressureLimit(const TargetRegisterClass *RC,
42 MachineFunction &MF) const;
44 /// Code Generation virtual methods...
45 const uint16_t *getCalleeSavedRegs(const MachineFunction* MF = 0) const;
46 const uint32_t *getCallPreservedMask(CallingConv::ID CC) const;
48 BitVector getReservedRegs(const MachineFunction &MF) const;
50 virtual bool avoidWriteAfterWrite(const TargetRegisterClass *RC) const;
52 /// We require the register scavenger.
53 bool requiresRegisterScavenging(const MachineFunction &MF) const {
57 bool requiresFrameIndexScavenging(const MachineFunction &MF) const {
61 bool trackLivenessAfterRegAlloc(const MachineFunction &MF) const {
65 void lowerDynamicAlloc(MachineBasicBlock::iterator II,
66 int SPAdj, RegScavenger *RS) const;
67 void lowerCRSpilling(MachineBasicBlock::iterator II, unsigned FrameIndex,
68 int SPAdj, RegScavenger *RS) const;
69 void lowerCRRestore(MachineBasicBlock::iterator II, unsigned FrameIndex,
70 int SPAdj, RegScavenger *RS) const;
71 bool hasReservedSpillSlot(const MachineFunction &MF, unsigned Reg,
73 void eliminateFrameIndex(MachineBasicBlock::iterator II,
74 int SPAdj, unsigned FIOperandNum,
75 RegScavenger *RS = NULL) const;
77 // Debug information queries.
78 unsigned getFrameRegister(const MachineFunction &MF) const;
80 // Exception handling queries.
81 unsigned getEHExceptionRegister() const;
82 unsigned getEHHandlerRegister() const;
85 } // end namespace llvm