Thumb1FrameLowering.cpp | Explore in Territory

//===- Thumb1FrameLowering.cpp - Thumb1 Frame Information -----------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file contains the Thumb1 implementation of TargetFrameLowering class.
//
//===----------------------------------------------------------------------===//

#include "Thumb1FrameLowering.h"
#include "ARMBaseInstrInfo.h"
#include "ARMBaseRegisterInfo.h"
#include "ARMMachineFunctionInfo.h"
#include "ARMSubtarget.h"
#include "Thumb1InstrInfo.h"
#include "ThumbRegisterInfo.h"
#include "Utils/ARMBaseInfo.h"
#include "llvm/ADT/BitVector.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/CodeGen/LivePhysRegs.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/MachineOperand.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/TargetInstrInfo.h"
#include "llvm/CodeGen/TargetOpcodes.h"
#include "llvm/CodeGen/TargetSubtargetInfo.h"
#include "llvm/IR/DebugLoc.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCDwarf.h"
#include "llvm/MC/MCRegisterInfo.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/MathExtras.h"
#include <cassert>
#include <iterator>
#include <vector>

usingnamespacellvm;

Thumb1FrameLowering::Thumb1FrameLowering(const ARMSubtarget &sti)
    : … { … }

bool Thumb1FrameLowering::hasReservedCallFrame(const MachineFunction &MF) const{ … }

static void
emitPrologueEpilogueSPUpdate(MachineBasicBlock &MBB,
                             MachineBasicBlock::iterator &MBBI,
                             const TargetInstrInfo &TII, const DebugLoc &dl,
                             const ThumbRegisterInfo &MRI, int NumBytes,
                             unsigned ScratchReg, unsigned MIFlags) { … }

static void emitCallSPUpdate(MachineBasicBlock &MBB,
                             MachineBasicBlock::iterator &MBBI,
                             const TargetInstrInfo &TII, const DebugLoc &dl,
                             const ThumbRegisterInfo &MRI, int NumBytes,
                             unsigned MIFlags = MachineInstr::NoFlags) { … }


MachineBasicBlock::iterator Thumb1FrameLowering::
eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
                              MachineBasicBlock::iterator I) const { … }

void Thumb1FrameLowering::emitPrologue(MachineFunction &MF,
                                       MachineBasicBlock &MBB) const { … }

void Thumb1FrameLowering::emitEpilogue(MachineFunction &MF,
                                   MachineBasicBlock &MBB) const { … }

bool Thumb1FrameLowering::canUseAsEpilogue(const MachineBasicBlock &MBB) const { … }

bool Thumb1FrameLowering::needPopSpecialFixUp(const MachineFunction &MF) const { … }

static void findTemporariesForLR(const BitVector &GPRsNoLRSP,
                                 const BitVector &PopFriendly,
                                 const LiveRegUnits &UsedRegs, unsigned &PopReg,
                                 unsigned &TmpReg, MachineRegisterInfo &MRI) { … }

bool Thumb1FrameLowering::emitPopSpecialFixUp(MachineBasicBlock &MBB,
                                              bool DoIt) const { … }

static const SmallVector<Register> OrderedLowRegs = …;
static const SmallVector<Register> OrderedHighRegs = …;
static const SmallVector<Register> OrderedCopyRegs = …;

static void splitLowAndHighRegs(const std::set<Register> &Regs,
                                std::set<Register> &LowRegs,
                                std::set<Register> &HighRegs) { … }

template <typename It>
It getNextOrderedReg(It OrderedStartIt, It OrderedEndIt,
                     const std::set<Register> &RegSet) { … }

static void pushRegsToStack(MachineBasicBlock &MBB,
                            MachineBasicBlock::iterator MI,
                            const TargetInstrInfo &TII,
                            const std::set<Register> &RegsToSave,
                            const std::set<Register> &CopyRegs) { … }

static void popRegsFromStack(MachineBasicBlock &MBB,
                             MachineBasicBlock::iterator &MI,
                             const TargetInstrInfo &TII,
                             const std::set<Register> &RegsToRestore,
                             const std::set<Register> &AvailableCopyRegs,
                             bool IsVarArg, bool HasV5Ops) { … }

bool Thumb1FrameLowering::spillCalleeSavedRegisters(
    MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
    ArrayRef<CalleeSavedInfo> CSI, const TargetRegisterInfo *TRI) const { … }

bool Thumb1FrameLowering::restoreCalleeSavedRegisters(
    MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
    MutableArrayRef<CalleeSavedInfo> CSI, const TargetRegisterInfo *TRI) const { … }
llvm/llvm/lib/Target/ARM/Thumb1FrameLowering.cpp
