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//===-- PPCRegisterInfo.h - PowerPC Register Information Impl ---*- C++ -*-===//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
// This file contains the PowerPC implementation of the TargetRegisterInfo
// class.
#include "MCTargetDesc/PPCMCTargetDesc.h"
#include "llvm/ADT/DenseMap.h"
#include ""
namespace llvm {
class PPCTargetMachine;
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;
PPCRegisterInfo(const PPCTargetMachine &TM);
/// getMappedIdxOpcForImmOpc - Return the mapped index form load/store opcode
/// for a given imm form load/store opcode \p ImmFormOpcode.
/// FIXME: move this to PPCInstrInfo class.
unsigned getMappedIdxOpcForImmOpc(unsigned ImmOpcode) const {
if (!ImmToIdxMap.count(ImmOpcode))
return ImmToIdxMap.find(ImmOpcode)->second;
/// 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 override;
void adjustStackMapLiveOutMask(uint32_t *Mask) const override;
BitVector getReservedRegs(const MachineFunction &MF) const override;
bool isCallerPreservedPhysReg(MCRegister PhysReg,
const MachineFunction &MF) const override;
// Provide hints to the register allocator for allocating subregisters
// of primed and unprimed accumulators. For example, if accumulator
// ACC5 is assigned, we also want to assign UACC5 to the input.
// Similarly if UACC5 is assigned, we want to assign VSRp10, VSRp11
// to its inputs.
bool getRegAllocationHints(Register VirtReg, ArrayRef<MCPhysReg> Order,
SmallVectorImpl<MCPhysReg> &Hints,
const MachineFunction &MF, const VirtRegMap *VRM,
const LiveRegMatrix *Matrix) const override;
/// We require the register scavenger.
bool requiresRegisterScavenging(const MachineFunction &MF) const override {
return true;
bool requiresFrameIndexScavenging(const MachineFunction &MF) const override;
bool requiresVirtualBaseRegisters(const MachineFunction &MF) const override;
void lowerDynamicAlloc(MachineBasicBlock::iterator II) const;
void lowerDynamicAreaOffset(MachineBasicBlock::iterator II) const;
void prepareDynamicAlloca(MachineBasicBlock::iterator II,
Register &NegSizeReg, bool &KillNegSizeReg,
Register &FramePointer) const;
void lowerPrepareProbedAlloca(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 lowerACCSpilling(MachineBasicBlock::iterator II,
unsigned FrameIndex) const;
void lowerACCRestore(MachineBasicBlock::iterator II,
unsigned FrameIndex) const;
void lowerQuadwordSpilling(MachineBasicBlock::iterator II,
unsigned FrameIndex) const;
void lowerQuadwordRestore(MachineBasicBlock::iterator II,
unsigned FrameIndex) const;
static void emitAccCopyInfo(MachineBasicBlock &MBB, MCRegister DestReg,
MCRegister SrcReg);
bool hasReservedSpillSlot(const MachineFunction &MF, Register 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;
Register materializeFrameBaseRegister(MachineBasicBlock *MBB, int FrameIdx,
int64_t Offset) const override;
void resolveFrameIndex(MachineInstr &MI, Register BaseReg,
int64_t Offset) const override;
bool isFrameOffsetLegal(const MachineInstr *MI, Register BaseReg,
int64_t Offset) const override;
// Debug information queries.
Register getFrameRegister(const MachineFunction &MF) const override;
// Base pointer (stack realignment) support.
Register getBaseRegister(const MachineFunction &MF) const;
bool hasBasePointer(const MachineFunction &MF) const;
/// stripRegisterPrefix - This method strips the character prefix from a
/// register name so that only the number is left. Used by for linux asm.
static const char *stripRegisterPrefix(const char *RegName) {
switch (RegName[0]) {
case 'a':
if (RegName[1] == 'c' && RegName[2] == 'c')
return RegName + 3;
case 'r':
case 'f':
case 'v':
if (RegName[1] == 's') {
if (RegName[2] == 'p')
return RegName + 3;
return RegName + 2;
return RegName + 1;
case 'c': if (RegName[1] == 'r') return RegName + 2;
return RegName;
} // end namespace llvm