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//===-- PPCRegisterInfo.h - PowerPC Register Information Impl ---*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains the PowerPC implementation of the TargetRegisterInfo
// class.
//
//===----------------------------------------------------------------------===//
#ifndef POWERPC32_REGISTERINFO_H
#define POWERPC32_REGISTERINFO_H
#include "PPC.h"
#include "llvm/ADT/DenseMap.h"
#define GET_REGINFO_HEADER
#include "PPCGenRegisterInfo.inc"
namespace llvm {
class PPCSubtarget;
class TargetInstrInfo;
class Type;
class PPCRegisterInfo : public PPCGenRegisterInfo {
DenseMap<unsigned, unsigned> ImmToIdxMap;
const PPCSubtarget &Subtarget;
public:
PPCRegisterInfo(const PPCSubtarget &SubTarget);
/// getPointerRegClass - Return the register class to use to hold pointers.
/// This is used for addressing modes.
const TargetRegisterClass *
getPointerRegClass(const MachineFunction &MF, unsigned Kind=0) const override;
unsigned getRegPressureLimit(const TargetRegisterClass *RC,
MachineFunction &MF) const override;
const TargetRegisterClass*
getLargestLegalSuperClass(const TargetRegisterClass *RC) const override;
/// Code Generation virtual methods...
const MCPhysReg *
getCalleeSavedRegs(const MachineFunction* MF =nullptr) const override;
const uint32_t *getCallPreservedMask(CallingConv::ID CC) const override;
const uint32_t *getNoPreservedMask() const;
BitVector getReservedRegs(const MachineFunction &MF) const override;
/// We require the register scavenger.
bool requiresRegisterScavenging(const MachineFunction &MF) const override {
return true;
}
bool requiresFrameIndexScavenging(const MachineFunction &MF) const override {
return true;
}
bool trackLivenessAfterRegAlloc(const MachineFunction &MF) const override {
return true;
}
bool requiresVirtualBaseRegisters(const MachineFunction &MF) const override {
return true;
}
void lowerDynamicAlloc(MachineBasicBlock::iterator II) const;
void lowerCRSpilling(MachineBasicBlock::iterator II,
unsigned FrameIndex) const;
void lowerCRRestore(MachineBasicBlock::iterator II,
unsigned FrameIndex) const;
void lowerCRBitSpilling(MachineBasicBlock::iterator II,
unsigned FrameIndex) const;
void lowerCRBitRestore(MachineBasicBlock::iterator II,
unsigned FrameIndex) const;
void lowerVRSAVESpilling(MachineBasicBlock::iterator II,
unsigned FrameIndex) const;
void lowerVRSAVERestore(MachineBasicBlock::iterator II,
unsigned FrameIndex) const;
bool hasReservedSpillSlot(const MachineFunction &MF, unsigned Reg,
int &FrameIdx) const override;
void eliminateFrameIndex(MachineBasicBlock::iterator II,
int SPAdj, unsigned FIOperandNum,
RegScavenger *RS = nullptr) const override;
// Support for virtual base registers.
bool needsFrameBaseReg(MachineInstr *MI, int64_t Offset) const override;
void materializeFrameBaseRegister(MachineBasicBlock *MBB,
unsigned BaseReg, int FrameIdx,
int64_t Offset) const override;
void resolveFrameIndex(MachineInstr &MI, unsigned BaseReg,
int64_t Offset) const override;
bool isFrameOffsetLegal(const MachineInstr *MI,
int64_t Offset) const override;
// Debug information queries.
unsigned getFrameRegister(const MachineFunction &MF) const override;
// Base pointer (stack realignment) support.
unsigned getBaseRegister(const MachineFunction &MF) const;
bool hasBasePointer(const MachineFunction &MF) const;
bool canRealignStack(const MachineFunction &MF) const;
bool needsStackRealignment(const MachineFunction &MF) const override;
};
} // end namespace llvm
#endif
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