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 "PPCGenRegisterInfo.h.inc" 20#include <map> 21 22namespace llvm { 23class PPCSubtarget; 24class TargetInstrInfo; 25class Type; 26 27class PPCRegisterInfo : public PPCGenRegisterInfo { 28 std::map<unsigned, unsigned> ImmToIdxMap; 29 const PPCSubtarget &Subtarget; 30 const TargetInstrInfo &TII; 31public: 32 PPCRegisterInfo(const PPCSubtarget &SubTarget, const TargetInstrInfo &tii); 33 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); 37 38 /// getPointerRegClass - Return the register class to use to hold pointers. 39 /// This is used for addressing modes. 40 virtual const TargetRegisterClass *getPointerRegClass() const; 41 42 /// Code Generation virtual methods... 43 const unsigned *getCalleeSavedRegs(const MachineFunction* MF = 0) const; 44 45 const TargetRegisterClass* const* 46 getCalleeSavedRegClasses(const MachineFunction *MF = 0) const; 47 48 BitVector getReservedRegs(const MachineFunction &MF) const; 49 50 /// targetHandlesStackFrameRounding - Returns true if the target is 51 /// responsible for rounding up the stack frame (probably at emitPrologue 52 /// time). 53 bool targetHandlesStackFrameRounding() const { return true; } 54 55 /// requiresRegisterScavenging - We require a register scavenger. 56 /// FIXME (64-bit): Should be inlined. 57 bool requiresRegisterScavenging(const MachineFunction &MF) const; 58 59 bool hasFP(const MachineFunction &MF) const; 60 61 void eliminateCallFramePseudoInstr(MachineFunction &MF, 62 MachineBasicBlock &MBB, 63 MachineBasicBlock::iterator I) const; 64 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 eliminateFrameIndex(MachineBasicBlock::iterator II, 70 int SPAdj, RegScavenger *RS = NULL) const; 71 72 /// determineFrameLayout - Determine the size of the frame and maximum call 73 /// frame size. 74 void determineFrameLayout(MachineFunction &MF) const; 75 76 void processFunctionBeforeCalleeSavedScan(MachineFunction &MF, 77 RegScavenger *RS = NULL) const;
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