1//===-- PPCRegisterInfo.h - PowerPC Register Information Impl ---*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file contains the PowerPC implementation of the TargetRegisterInfo 11// class. 12// 13//===----------------------------------------------------------------------===// 14 15#ifndef POWERPC32_REGISTERINFO_H 16#define POWERPC32_REGISTERINFO_H 17 18#include "PPC.h" 19#include <map> 20 21#define GET_REGINFO_HEADER 22#include "PPCGenRegisterInfo.inc" 23 24namespace llvm { 25class PPCSubtarget; 26class TargetInstrInfo; 27class Type; 28 29class PPCRegisterInfo : public PPCGenRegisterInfo { 30 std::map<unsigned, unsigned> ImmToIdxMap; 31 const PPCSubtarget &Subtarget; 32 const TargetInstrInfo &TII; 33 mutable int CRSpillFrameIdx; 34public: 35 PPCRegisterInfo(const PPCSubtarget &SubTarget, const TargetInstrInfo &tii); 36 37 /// getPointerRegClass - Return the register class to use to hold pointers. 38 /// This is used for addressing modes. 39 virtual const TargetRegisterClass * 40 getPointerRegClass(const MachineFunction &MF, unsigned Kind=0) const; 41 42 unsigned getRegPressureLimit(const TargetRegisterClass *RC, 43 MachineFunction &MF) const; 44 45 /// Code Generation virtual methods... 46 const uint16_t *getCalleeSavedRegs(const MachineFunction* MF = 0) const; 47 const uint32_t *getCallPreservedMask(CallingConv::ID CC) const; 48 49 BitVector getReservedRegs(const MachineFunction &MF) const; 50 51 virtual bool avoidWriteAfterWrite(const TargetRegisterClass *RC) const; 52 53 /// requiresRegisterScavenging - We require a register scavenger. 54 /// FIXME (64-bit): Should be inlined. 55 bool requiresRegisterScavenging(const MachineFunction &MF) const; 56 57 bool trackLivenessAfterRegAlloc(const MachineFunction &MF) const; 58 59 void eliminateCallFramePseudoInstr(MachineFunction &MF, 60 MachineBasicBlock &MBB, 61 MachineBasicBlock::iterator I) const; 62 63 void lowerDynamicAlloc(MachineBasicBlock::iterator II, 64 int SPAdj, RegScavenger *RS) const; 65 void lowerCRSpilling(MachineBasicBlock::iterator II, unsigned FrameIndex, 66 int SPAdj, RegScavenger *RS) const; 67 void lowerCRRestore(MachineBasicBlock::iterator II, unsigned FrameIndex, 68 int SPAdj, RegScavenger *RS) const; 69 bool hasReservedSpillSlot(const MachineFunction &MF, unsigned Reg, 70 int &FrameIdx) const; 71 void eliminateFrameIndex(MachineBasicBlock::iterator II, 72 int SPAdj, RegScavenger *RS = NULL) const; 73 74 // Debug information queries. 75 unsigned getFrameRegister(const MachineFunction &MF) const; 76 77 // Exception handling queries. 78 unsigned getEHExceptionRegister() const; 79 unsigned getEHHandlerRegister() const; 80}; 81 82} // end namespace llvm 83 84#endif 85