ARMFrameLowering.cpp File Reference

#include "ARMFrameLowering.h"
#include "ARMBaseInstrInfo.h"
#include "ARMBaseRegisterInfo.h"
#include "ARMMachineFunctionInfo.h"
#include "MCTargetDesc/ARMAddressingModes.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/RegisterScavenging.h"
#include "llvm/IR/CallingConv.h"
#include "llvm/IR/Function.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Target/TargetOptions.h"

Include dependency graph for ARMFrameLowering.cpp:

Go to the source code of this file.

Functions
static MachineBasicBlock::iterator	skipAlignedDPRCS2Spills (MachineBasicBlock::iterator MI, unsigned NumAlignedDPRCS2Regs)
static bool	isCalleeSavedRegister (unsigned Reg, const uint16_t *CSRegs)
static bool	isCSRestore (MachineInstr *MI, const ARMBaseInstrInfo &TII, const uint16_t *CSRegs)
static void	emitRegPlusImmediate (bool isARM, MachineBasicBlock &MBB, MachineBasicBlock::iterator &MBBI, DebugLoc dl, const ARMBaseInstrInfo &TII, unsigned DestReg, unsigned SrcReg, int NumBytes, unsigned MIFlags=MachineInstr::NoFlags, ARMCC::CondCodes Pred=ARMCC::AL, unsigned PredReg=0)
static void	emitSPUpdate (bool isARM, MachineBasicBlock &MBB, MachineBasicBlock::iterator &MBBI, DebugLoc dl, const ARMBaseInstrInfo &TII, int NumBytes, unsigned MIFlags=MachineInstr::NoFlags, ARMCC::CondCodes Pred=ARMCC::AL, unsigned PredReg=0)
static void	emitAlignedDPRCS2Spills (MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, unsigned NumAlignedDPRCS2Regs, const std::vector< CalleeSavedInfo > &CSI, const TargetRegisterInfo *TRI)
static void	emitAlignedDPRCS2Restores (MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, unsigned NumAlignedDPRCS2Regs, const std::vector< CalleeSavedInfo > &CSI, const TargetRegisterInfo *TRI)
static unsigned	GetFunctionSizeInBytes (const MachineFunction &MF, const ARMBaseInstrInfo &TII)
static unsigned	estimateRSStackSizeLimit (MachineFunction &MF, const TargetFrameLowering *TFI)
static void	checkNumAlignedDPRCS2Regs (MachineFunction &MF)

Variables
static cl::opt< bool >	SpillAlignedNEONRegs ("align-neon-spills", cl::Hidden, cl::init(true), cl::desc("Align ARM NEON spills in prolog and epilog"))

Function Documentation

static void checkNumAlignedDPRCS2Regs ( MachineFunction &  MF )

static

Definition at line 1117 of file ARMFrameLowering.cpp.

References llvm::ARMBaseRegisterInfo::canRealignStack(), llvm::X86II::D8, llvm::Function::getAttributes(), llvm::TargetMachine::getFrameLowering(), llvm::MachineFunction::getFunction(), llvm::MachineFunction::getInfo(), llvm::MachineFunction::getRegInfo(), llvm::TargetMachine::getRegisterInfo(), llvm::TargetFrameLowering::getStackAlignment(), llvm::TargetMachine::getSubtarget(), llvm::MachineFunction::getTarget(), llvm::AttributeSet::hasAttribute(), llvm::MachineRegisterInfo::isPhysRegUsed(), MRI, llvm::Attribute::Naked, R4, llvm::MachineRegisterInfo::setPhysRegUsed(), and SpillAlignedNEONRegs.

Referenced by llvm::ARMFrameLowering::processFunctionBeforeCalleeSavedScan().

static void emitAlignedDPRCS2Restores ( MachineBasicBlock &  MBB, MachineBasicBlock::iterator  MI, unsigned  NumAlignedDPRCS2Regs, const std::vector< CalleeSavedInfo > &  CSI, const TargetRegisterInfo *  TRI  )

static

Emit aligned reload instructions for NumAlignedDPRCS2Regs D-registers starting from d8. These instructions are assumed to execute while the stack is still aligned, unlike the code inserted by emitPopInst.

Definition at line 906 of file ARMFrameLowering.cpp.

References llvm::AddDefaultCC(), llvm::AddDefaultPred(), llvm::MachineInstrBuilder::addImm(), llvm::MachineInstrBuilder::addReg(), llvm::BuildMI(), llvm::X86II::D8, llvm::RegState::Define, llvm::MCInstrInfo::get(), llvm::MachineFunction::getInfo(), llvm::TargetMachine::getInstrInfo(), llvm::TargetRegisterInfo::getMatchingSuperReg(), llvm::MachineBasicBlock::getParent(), getReg(), llvm::MachineFunction::getTarget(), llvm::RegState::ImplicitDefine, llvm::ARMFunctionInfo::isThumb1OnlyFunction(), llvm::ARMFunctionInfo::isThumbFunction(), llvm::RegState::Kill, llvm::prior(), and R4.

Referenced by llvm::ARMFrameLowering::restoreCalleeSavedRegisters().

static void emitAlignedDPRCS2Spills ( MachineBasicBlock &  MBB, MachineBasicBlock::iterator  MI, unsigned  NumAlignedDPRCS2Regs, const std::vector< CalleeSavedInfo > &  CSI, const TargetRegisterInfo *  TRI  )

static

Emit aligned spill instructions for NumAlignedDPRCS2Regs D-registers starting from d8. Also insert stack realignment code and leave the stack pointer pointing to the d8 spill slot.

Definition at line 747 of file ARMFrameLowering.cpp.

References llvm::AddDefaultCC(), llvm::AddDefaultPred(), llvm::MachineInstrBuilder::addImm(), llvm::MachineBasicBlock::addLiveIn(), llvm::MachineInstrBuilder::addReg(), llvm::BuildMI(), llvm::X86II::D8, llvm::MCInstrInfo::get(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getInfo(), llvm::TargetMachine::getInstrInfo(), llvm::TargetRegisterInfo::getMatchingSuperReg(), llvm::MachineFrameInfo::getMaxAlignment(), llvm::MachineBasicBlock::getParent(), llvm::MachineFunction::getTarget(), llvm::RegState::ImplicitKill, llvm::ARMFunctionInfo::isThumb1OnlyFunction(), llvm::ARMFunctionInfo::isThumbFunction(), llvm::RegState::Kill, llvm::prior(), R4, llvm::MachineFrameInfo::setObjectAlignment(), and llvm::ARMFunctionInfo::setShouldRestoreSPFromFP().

Referenced by llvm::ARMFrameLowering::spillCalleeSavedRegisters().

static void emitRegPlusImmediate ( bool  isARM, MachineBasicBlock &  MBB, MachineBasicBlock::iterator &  MBBI, DebugLoc  dl, const ARMBaseInstrInfo &  TII, unsigned  DestReg, unsigned  SrcReg, int  NumBytes, unsigned  MIFlags = MachineInstr::NoFlags, ARMCC::CondCodes  Pred = ARMCC::AL, unsigned  PredReg = 0  )

static

Definition at line 114 of file ARMFrameLowering.cpp.

References llvm::emitARMRegPlusImmediate(), and llvm::emitT2RegPlusImmediate().

Referenced by llvm::ARMFrameLowering::emitPrologue(), and emitSPUpdate().

static void emitSPUpdate ( bool  isARM, MachineBasicBlock &  MBB, MachineBasicBlock::iterator &  MBBI, DebugLoc  dl, const ARMBaseInstrInfo &  TII, int  NumBytes, unsigned  MIFlags = MachineInstr::NoFlags, ARMCC::CondCodes  Pred = ARMCC::AL, unsigned  PredReg = 0  )

static

Definition at line 129 of file ARMFrameLowering.cpp.

References emitRegPlusImmediate().

static unsigned estimateRSStackSizeLimit ( MachineFunction &  MF, const TargetFrameLowering *  TFI  )

static

estimateRSStackSizeLimit - Look at each instruction that references stack frames and return the stack size limit beyond which some of these instructions will require a scratch register during their expansion later.

Definition at line 1064 of file ARMFrameLowering.cpp.

References llvm::ARMII::AddrMode3, llvm::ARMII::AddrMode4, llvm::ARMII::AddrMode5, llvm::ARMII::AddrMode6, llvm::ARMII::AddrModeMask, llvm::ARMII::AddrModeT2_i12, llvm::ARMII::AddrModeT2_i8, llvm::ARMII::AddrModeT2_i8s4, llvm::MachineFunction::begin(), llvm::MachineFunction::end(), llvm::MachineFunction::getInfo(), llvm::TargetFrameLowering::hasFP(), llvm::ARMFunctionInfo::hasStackFrame(), and I.

Referenced by llvm::ARMFrameLowering::processFunctionBeforeCalleeSavedScan().

static unsigned GetFunctionSizeInBytes ( const MachineFunction &  MF, const ARMBaseInstrInfo &  TII  )

static

Definition at line 1047 of file ARMFrameLowering.cpp.

References llvm::MachineBasicBlock::begin(), llvm::MachineFunction::begin(), llvm::MachineBasicBlock::end(), llvm::MachineFunction::end(), llvm::ARMBaseInstrInfo::GetInstSizeInBytes(), and I.

Referenced by llvm::ARMFrameLowering::processFunctionBeforeCalleeSavedScan().

static bool isCalleeSavedRegister ( unsigned  Reg, const uint16_t *  CSRegs  )

static

Definition at line 85 of file ARMFrameLowering.cpp.

Referenced by isCSRestore().

static bool isCSRestore ( MachineInstr *  MI, const ARMBaseInstrInfo &  TII, const uint16_t *  CSRegs  )

static

Definition at line 92 of file ARMFrameLowering.cpp.

References llvm::MachineInstr::getNumOperands(), llvm::MachineInstr::getOpcode(), llvm::MachineInstr::getOperand(), llvm::MachineOperand::getReg(), isCalleeSavedRegister(), and llvm::isPopOpcode().

Referenced by llvm::ARMFrameLowering::emitEpilogue().

static MachineBasicBlock::iterator skipAlignedDPRCS2Spills ( MachineBasicBlock::iterator  MI, unsigned  NumAlignedDPRCS2Regs  )

static

Skip past the code inserted by emitAlignedDPRCS2Spills, and return an iterator to the following instruction.

Definition at line 878 of file ARMFrameLowering.cpp.

References llvm::A64CC::MI, and R4.

Referenced by llvm::ARMFrameLowering::emitPrologue().

Variable Documentation

cl::opt<bool> SpillAlignedNEONRegs("align-neon-spills", cl::Hidden, cl::init(true), cl::desc("Align ARM NEON spills in prolog and epilog"))

static

Referenced by checkNumAlignedDPRCS2Regs().