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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 LLVM_LIB_TARGET_POWERPC_PPCREGISTERINFO_H
#define LLVM_LIB_TARGET_POWERPC_PPCREGISTERINFO_H
#include "PPC.h"
#include "llvm/ADT/DenseMap.h"
#define GET_REGINFO_HEADER
#include "PPCGenRegisterInfo.inc"
namespace llvm {
inline static unsigned getCRFromCRBit(unsigned SrcReg) {
unsigned Reg = 0;
if (SrcReg == PPC::CR0LT || SrcReg == PPC::CR0GT ||
SrcReg == PPC::CR0EQ || SrcReg == PPC::CR0UN)
Reg = PPC::CR0;
else if (SrcReg == PPC::CR1LT || SrcReg == PPC::CR1GT ||
SrcReg == PPC::CR1EQ || SrcReg == PPC::CR1UN)
Reg = PPC::CR1;
else if (SrcReg == PPC::CR2LT || SrcReg == PPC::CR2GT ||
SrcReg == PPC::CR2EQ || SrcReg == PPC::CR2UN)
Reg = PPC::CR2;
else if (SrcReg == PPC::CR3LT || SrcReg == PPC::CR3GT ||
SrcReg == PPC::CR3EQ || SrcReg == PPC::CR3UN)
Reg = PPC::CR3;
else if (SrcReg == PPC::CR4LT || SrcReg == PPC::CR4GT ||
SrcReg == PPC::CR4EQ || SrcReg == PPC::CR4UN)
Reg = PPC::CR4;
else if (SrcReg == PPC::CR5LT || SrcReg == PPC::CR5GT ||
SrcReg == PPC::CR5EQ || SrcReg == PPC::CR5UN)
Reg = PPC::CR5;
else if (SrcReg == PPC::CR6LT || SrcReg == PPC::CR6GT ||
SrcReg == PPC::CR6EQ || SrcReg == PPC::CR6UN)
Reg = PPC::CR6;
else if (SrcReg == PPC::CR7LT || SrcReg == PPC::CR7GT ||
SrcReg == PPC::CR7EQ || SrcReg == PPC::CR7UN)
Reg = PPC::CR7;
assert(Reg != 0 && "Invalid CR bit register");
return Reg;
}
class PPCRegisterInfo : public PPCGenRegisterInfo {
DenseMap<unsigned, unsigned> ImmToIdxMap;
const PPCTargetMachine &TM;
public:
PPCRegisterInfo(const PPCTargetMachine &TM);
/// 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 MachineFunction &MF) const override;
/// Code Generation virtual methods...
const MCPhysReg *getCalleeSavedRegs(const MachineFunction *MF) const override;
const uint32_t *getCallPreservedMask(const MachineFunction &MF,
CallingConv::ID CC) const override;
const uint32_t *getNoPreservedMask() const;
void adjustStackMapLiveOutMask(uint32_t *Mask) const override;
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, unsigned BaseReg,
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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