#include "Target/AMDGPU/SIFrameLowering.h"

Inheritance diagram for llvm::SIFrameLowering:

Public Member Functions
	SIFrameLowering (StackDirection D, Align StackAl, int LAO, Align TransAl=Align(1))
	~SIFrameLowering () override=default
void	emitEntryFunctionPrologue (MachineFunction &MF, MachineBasicBlock &MBB) const
void	emitPrologue (MachineFunction &MF, MachineBasicBlock &MBB) const override
	emitProlog/emitEpilog - These methods insert prolog and epilog code into the function.
void	emitEpilogue (MachineFunction &MF, MachineBasicBlock &MBB) const override
StackOffset	getFrameIndexReference (const MachineFunction &MF, int FI, Register &FrameReg) const override
	getFrameIndexReference - This method should return the base register and offset used to reference a frame index location.
void	determineCalleeSaves (MachineFunction &MF, BitVector &SavedRegs, RegScavenger *RS=nullptr) const override
	This method determines which of the registers reported by TargetRegisterInfo::getCalleeSavedRegs() should actually get saved.
void	determineCalleeSavesSGPR (MachineFunction &MF, BitVector &SavedRegs, RegScavenger *RS=nullptr) const
void	determinePrologEpilogSGPRSaves (MachineFunction &MF, BitVector &SavedRegs, bool NeedExecCopyReservedReg) const
void	emitCSRSpillStores (MachineFunction &MF, MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI, DebugLoc &DL, LiveRegUnits &LiveUnits, Register FrameReg, Register FramePtrRegScratchCopy) const
void	emitCSRSpillRestores (MachineFunction &MF, MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI, DebugLoc &DL, LiveRegUnits &LiveUnits, Register FrameReg, Register FramePtrRegScratchCopy) const
bool	assignCalleeSavedSpillSlots (MachineFunction &MF, const TargetRegisterInfo *TRI, std::vector< CalleeSavedInfo > &CSI) const override
bool	assignCalleeSavedSpillSlots (MachineFunction &MF, const TargetRegisterInfo *TRI, std::vector< CalleeSavedInfo > &CSI, unsigned &MinCSFrameIndex, unsigned &MaxCSFrameIndex) const override
	assignCalleeSavedSpillSlots - Allows target to override spill slot assignment logic.
bool	spillCalleeSavedRegisters (MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, ArrayRef< CalleeSavedInfo > CSI, const TargetRegisterInfo *TRI) const override
	spillCalleeSavedRegisters - Issues instruction(s) to spill all callee saved registers and returns true if it isn't possible / profitable to do so by issuing a series of store instructions via storeRegToStackSlot().
bool	restoreCalleeSavedRegisters (MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, MutableArrayRef< CalleeSavedInfo > CSI, const TargetRegisterInfo *TRI) const override
	restoreCalleeSavedRegisters - Issues instruction(s) to restore all callee saved registers and returns true if it isn't possible / profitable to do so by issuing a series of load instructions via loadRegToStackSlot().
bool	allocateScavengingFrameIndexesNearIncomingSP (const MachineFunction &MF) const override
	Control the placement of special register scavenging spill slots when allocating a stack frame.
bool	isSupportedStackID (TargetStackID::Value ID) const override
void	processFunctionBeforeFrameFinalized (MachineFunction &MF, RegScavenger *RS=nullptr) const override
	processFunctionBeforeFrameFinalized - This method is called immediately before the specified function's frame layout (MF.getFrameInfo()) is finalized.
void	processFunctionBeforeFrameIndicesReplaced (MachineFunction &MF, RegScavenger *RS=nullptr) const override
	processFunctionBeforeFrameIndicesReplaced - This method is called immediately before MO_FrameIndex operands are eliminated, but after the frame is finalized.
MachineBasicBlock::iterator	eliminateCallFramePseudoInstr (MachineFunction &MF, MachineBasicBlock &MBB, MachineBasicBlock::iterator MI) const override
	This method is called during prolog/epilog code insertion to eliminate call frame setup and destroy pseudo instructions (but only if the Target is using them).
bool	requiresStackPointerReference (const MachineFunction &MF) const
bool	mayReserveScratchForCWSR (const MachineFunction &MF) const
Public Member Functions inherited from llvm::AMDGPUFrameLowering
	AMDGPUFrameLowering (StackDirection D, Align StackAl, int LAO, Align TransAl=Align(1))
	~AMDGPUFrameLowering () override
unsigned	getStackWidth (const MachineFunction &MF) const
Public Member Functions inherited from llvm::TargetFrameLowering
	TargetFrameLowering (StackDirection D, Align StackAl, int LAO, Align TransAl=Align(1), bool StackReal=true)
virtual	~TargetFrameLowering ()
StackDirection	getStackGrowthDirection () const
	getStackGrowthDirection - Return the direction the stack grows
unsigned	getStackAlignment () const
	getStackAlignment - This method returns the number of bytes to which the stack pointer must be aligned on entry to a function.
Align	getStackAlign () const
	getStackAlignment - This method returns the number of bytes to which the stack pointer must be aligned on entry to a function.
virtual uint64_t	getStackThreshold () const
	getStackThreshold - Return the maximum stack size
int	alignSPAdjust (int SPAdj) const
	alignSPAdjust - This method aligns the stack adjustment to the correct alignment.
Align	getTransientStackAlign () const
	getTransientStackAlignment - This method returns the number of bytes to which the stack pointer must be aligned at all times, even between calls.
bool	isStackRealignable () const
	isStackRealignable - This method returns whether the stack can be realigned.
virtual bool	isStackIdSafeForLocalArea (unsigned StackId) const
	This method returns whether or not it is safe for an object with the given stack id to be bundled into the local area.
int	getOffsetOfLocalArea () const
	getOffsetOfLocalArea - This method returns the offset of the local area from the stack pointer on entrance to a function.
virtual const SpillSlot *	getCalleeSavedSpillSlots (unsigned &NumEntries) const
	getCalleeSavedSpillSlots - This method returns a pointer to an array of pairs, that contains an entry for each callee saved register that must be spilled to a particular stack location if it is spilled.
virtual bool	targetHandlesStackFrameRounding () const
	targetHandlesStackFrameRounding - Returns true if the target is responsible for rounding up the stack frame (probably at emitPrologue time).
virtual bool	enableShrinkWrapping (const MachineFunction &MF) const
	Returns true if the target will correctly handle shrink wrapping.
virtual bool	enableStackSlotScavenging (const MachineFunction &MF) const
	Returns true if the stack slot holes in the fixed and callee-save stack area should be used when allocating other stack locations to reduce stack size.
virtual bool	enableCalleeSaveSkip (const MachineFunction &MF) const
	Returns true if the target can safely skip saving callee-saved registers for noreturn nounwind functions.
virtual void	emitZeroCallUsedRegs (BitVector RegsToZero, MachineBasicBlock &MBB) const
	emitZeroCallUsedRegs - Zeros out call used registers.
virtual void	emitCalleeSavedFrameMovesFullCFA (MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI) const
	With basic block sections, emit callee saved frame moves for basic blocks that are in a different section.
virtual bool	enableCFIFixup (const MachineFunction &MF) const
	Returns true if we may need to fix the unwind information for the function.
virtual bool	enableFullCFIFixup (const MachineFunction &MF) const
	enableFullCFIFixup - Returns true if we may need to fix the unwind information such that it is accurate for every instruction in the function (e.g.
virtual void	resetCFIToInitialState (MachineBasicBlock &MBB) const
	Emit CFI instructions that recreate the state of the unwind information upon function entry.
virtual void	inlineStackProbe (MachineFunction &MF, MachineBasicBlock &PrologueMBB) const
	Replace a StackProbe stub (if any) with the actual probe code inline.
virtual bool	stackProbeFunctionModifiesSP () const
	Does the stack probe function call return with a modified stack pointer?
virtual void	adjustForSegmentedStacks (MachineFunction &MF, MachineBasicBlock &PrologueMBB) const
	Adjust the prologue to have the function use segmented stacks.
virtual void	adjustForHiPEPrologue (MachineFunction &MF, MachineBasicBlock &PrologueMBB) const
	Adjust the prologue to add Erlang Run-Time System (ERTS) specific code in the assembly prologue to explicitly handle the stack.
void	spillCalleeSavedRegister (MachineBasicBlock &SaveBlock, MachineBasicBlock::iterator MI, const CalleeSavedInfo &CS, const TargetInstrInfo TII, const TargetRegisterInfo TRI) const
	spillCalleeSavedRegister - Default implementation for spilling a single callee saved register.
void	restoreCalleeSavedRegister (MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, const CalleeSavedInfo &CS, const TargetInstrInfo TII, const TargetRegisterInfo TRI) const
bool	hasFP (const MachineFunction &MF) const
	hasFP - Return true if the specified function should have a dedicated frame pointer register.
virtual bool	hasReservedCallFrame (const MachineFunction &MF) const
	hasReservedCallFrame - Under normal circumstances, when a frame pointer is not required, we reserve argument space for call sites in the function immediately on entry to the current function.
virtual bool	canSimplifyCallFramePseudos (const MachineFunction &MF) const
	canSimplifyCallFramePseudos - When possible, it's best to simplify the call frame pseudo ops before doing frame index elimination.
virtual bool	needsFrameIndexResolution (const MachineFunction &MF) const
virtual StackOffset	getFrameIndexReferencePreferSP (const MachineFunction &MF, int FI, Register &FrameReg, bool IgnoreSPUpdates) const
	Same as `getFrameIndexReference`, except that the stack pointer (as opposed to the frame pointer) will be the preferred value for `FrameReg`.
virtual StackOffset	getNonLocalFrameIndexReference (const MachineFunction &MF, int FI) const
	getNonLocalFrameIndexReference - This method returns the offset used to reference a frame index location.
virtual StackOffset	getFrameIndexReferenceFromSP (const MachineFunction &MF, int FI) const
	getFrameIndexReferenceFromSP - This method returns the offset from the stack pointer to the slot of the specified index.
virtual void	getCalleeSaves (const MachineFunction &MF, BitVector &SavedRegs) const
	Returns the callee-saved registers as computed by determineCalleeSaves in the BitVector `SavedRegs`.
virtual unsigned	getWinEHParentFrameOffset (const MachineFunction &MF) const
virtual void	orderFrameObjects (const MachineFunction &MF, SmallVectorImpl< int > &objectsToAllocate) const
	Order the symbols in the local stack frame.
virtual bool	canUseAsPrologue (const MachineBasicBlock &MBB) const
	Check whether or not the given `MBB` can be used as a prologue for the target.
virtual bool	canUseAsEpilogue (const MachineBasicBlock &MBB) const
	Check whether or not the given `MBB` can be used as a epilogue for the target.
virtual TargetStackID::Value	getStackIDForScalableVectors () const
	Returns the StackID that scalable vectors should be associated with.
virtual bool	isProfitableForNoCSROpt (const Function &F) const
	Check if the no-CSR optimisation is profitable for the given function.
virtual int	getInitialCFAOffset (const MachineFunction &MF) const
	Return initial CFA offset value i.e.
virtual Register	getInitialCFARegister (const MachineFunction &MF) const
	Return initial CFA register value i.e.
virtual DwarfFrameBase	getDwarfFrameBase (const MachineFunction &MF) const
	Return the frame base information to be encoded in the DWARF subprogram debug info.
virtual void	spillFPBP (MachineFunction &MF) const
	If frame pointer or base pointer is clobbered by an instruction, we should spill/restore it around that instruction.
virtual void	emitRemarks (const MachineFunction &MF, MachineOptimizationRemarkEmitter *ORE) const
	This method is called at the end of prolog/epilog code insertion, so targets can emit remarks based on the final frame layout.

Protected Member Functions
bool	hasFPImpl (const MachineFunction &MF) const override

Additional Inherited Members
Public Types inherited from llvm::TargetFrameLowering
enum	StackDirection { StackGrowsUp , StackGrowsDown }
Static Public Member Functions inherited from llvm::TargetFrameLowering
static bool	isSafeForNoCSROpt (const Function &F)
	Check if given function is safe for not having callee saved registers.

Detailed Description

Definition at line 17 of file SIFrameLowering.h.

Constructor & Destructor Documentation

◆ SIFrameLowering()

llvm::SIFrameLowering::SIFrameLowering	(	StackDirection	D,
		Align	StackAl,
		int	LAO,
		Align	TransAl = Align(1) )

inline

Definition at line 19 of file SIFrameLowering.h.

References llvm::AMDGPUFrameLowering::AMDGPUFrameLowering(), and D().

◆ ~SIFrameLowering()

llvm::SIFrameLowering::~SIFrameLowering ( )

overridedefault

References DL, I, MBB, MBBI, MI, and TRI.

Member Function Documentation

◆ allocateScavengingFrameIndexesNearIncomingSP()

bool SIFrameLowering::allocateScavengingFrameIndexesNearIncomingSP ( const MachineFunction & MF ) const

overridevirtual

Control the placement of special register scavenging spill slots when allocating a stack frame.

If this returns true, the frame indexes used by the RegScavenger will be allocated closest to the incoming stack pointer.

Reimplemented from llvm::TargetFrameLowering.

Definition at line 1971 of file SIFrameLowering.cpp.

References llvm::SIInstrFlags::FlatScratch, llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getSubtarget(), llvm::AMDGPUAS::PRIVATE_ADDRESS, and TII.

Referenced by processFunctionBeforeFrameFinalized().

◆ assignCalleeSavedSpillSlots() [1/2]

bool SIFrameLowering::assignCalleeSavedSpillSlots	(	MachineFunction &	MF,
		const TargetRegisterInfo *	TRI,
		std::vector< CalleeSavedInfo > &	CSI ) const

overridevirtual

Reimplemented from llvm::TargetFrameLowering.

Definition at line 1930 of file SIFrameLowering.cpp.

References llvm::Register::asMCReg(), llvm::SIMachineFunctionInfo::getFrameOffsetReg(), llvm::MachineFunction::getInfo(), llvm::SIMachineFunctionInfo::getScratchSGPRCopyDstReg(), llvm::MachineFunction::getSubtarget(), and TRI.

Referenced by assignCalleeSavedSpillSlots().

◆ assignCalleeSavedSpillSlots() [2/2]

bool SIFrameLowering::assignCalleeSavedSpillSlots	(	MachineFunction &	MF,
		const TargetRegisterInfo *	TRI,
		std::vector< CalleeSavedInfo > &	CSI,
		unsigned &	MinCSFrameIndex,
		unsigned &	MaxCSFrameIndex ) const

overridevirtual

assignCalleeSavedSpillSlots - Allows target to override spill slot assignment logic.

If implemented, assignCalleeSavedSpillSlots() should assign frame slots to all CSI entries and return true. If this method returns false, spill slots will be assigned using generic implementation. assignCalleeSavedSpillSlots() may add, delete or rearrange elements of CSI.

Reimplemented from llvm::TargetFrameLowering.

Definition at line 1914 of file SIFrameLowering.cpp.

References assignCalleeSavedSpillSlots(), assignSlotsUsingVGPRBlocks(), llvm::MachineFunction::getSubtarget(), and TRI.

◆ determineCalleeSaves()

void SIFrameLowering::determineCalleeSaves	(	MachineFunction &	MF,
		BitVector &	SavedRegs,
		RegScavenger *	RS = nullptr ) const

overridevirtual

This method determines which of the registers reported by TargetRegisterInfo::getCalleeSavedRegs() should actually get saved.

The default implementation checks populates the SavedRegs bitset with all registers which are modified in the function, targets may override this function to save additional registers. This method also sets up the register scavenger ensuring there is a free register or a frameindex available. This method should not be called by any passes outside of PEI, because it may change state passed in by MF and RS. The preferred interface outside PEI is getCalleeSaves.

Reimplemented from llvm::TargetFrameLowering.

Definition at line 1679 of file SIFrameLowering.cpp.

References llvm::SIMachineFunctionInfo::allocateWWMSpill(), assert(), llvm::MachineFunction::begin(), llvm::BitVector::clearBitsInMask(), llvm::BitVector::clearBitsNotInMask(), llvm::count_if(), llvm::TargetFrameLowering::determineCalleeSaves(), determinePrologEpilogSGPRSaves(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getInfo(), llvm::MachineFunction::getRegInfo(), llvm::MachineFunction::getSubtarget(), llvm::SIMachineFunctionInfo::getWWMReservedRegs(), llvm::SIMachineFunctionInfo::getWWMSpills(), llvm::MachineFrameInfo::hasTailCall(), llvm::AMDGPUMachineFunction::isChainFunction(), llvm::AMDGPUMachineFunction::isEntryFunction(), llvm::MachineRegisterInfo::isPhysRegModified(), llvm::SIMachineFunctionInfo::isWholeWaveFunction(), MBB, MI, llvm::MachineInstr::operands(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), llvm::SIMachineFunctionInfo::reserveWWMRegister(), llvm::BitVector::reset(), llvm::SIMachineFunctionInfo::shiftWwmVGPRsToLowestRange(), llvm::sort(), TII, and TRI.

◆ determineCalleeSavesSGPR()

void SIFrameLowering::determineCalleeSavesSGPR	(	MachineFunction &	MF,
		BitVector &	SavedRegs,
		RegScavenger *	RS = nullptr ) const

Definition at line 1785 of file SIFrameLowering.cpp.

References llvm::BitVector::any(), llvm::BitVector::clearBitsInMask(), llvm::TargetFrameLowering::determineCalleeSaves(), llvm::MachineFunction::getFrameInfo(), llvm::SIMachineFunctionInfo::getFrameOffsetReg(), llvm::MachineFunction::getInfo(), llvm::MachineFunction::getRegInfo(), llvm::SIMachineFunctionInfo::getStackPtrOffsetReg(), llvm::MachineFunction::getSubtarget(), llvm::MachineFrameInfo::hasCalls(), llvm::TargetFrameLowering::hasFP(), llvm::SIMachineFunctionInfo::hasSpilledSGPRs(), llvm::AMDGPUMachineFunction::isEntryFunction(), MRI, llvm::BitVector::reset(), llvm::BitVector::set(), and TRI.

◆ determinePrologEpilogSGPRSaves()

void SIFrameLowering::determinePrologEpilogSGPRSaves	(	MachineFunction &	MF,
		BitVector &	SavedRegs,
		bool	NeedExecCopyReservedReg ) const

◆ eliminateCallFramePseudoInstr()

MachineBasicBlock::iterator SIFrameLowering::eliminateCallFramePseudoInstr	(	MachineFunction &	MF,
		MachineBasicBlock &	MBB,
		MachineBasicBlock::iterator	MI ) const

overridevirtual

This method is called during prolog/epilog code insertion to eliminate call frame setup and destroy pseudo instructions (but only if the Target is using them).

It is responsible for eliminating these instructions, replacing them with concrete instructions. This method need only be implemented if using call frame setup/destroy pseudo instructions. Returns an iterator pointing to the instruction after the replaced one.

Reimplemented from llvm::TargetFrameLowering.

Definition at line 2104 of file SIFrameLowering.cpp.

References llvm::Add, llvm::MachineInstrBuilder::addImm(), llvm::MachineInstrBuilder::addReg(), llvm::alignTo(), assert(), llvm::BuildMI(), DL, llvm::MachineFunction::getInfo(), getScratchScaleFactor(), llvm::TargetFrameLowering::getStackAlign(), llvm::SIMachineFunctionInfo::getStackPtrOffsetReg(), llvm::MachineFunction::getSubtarget(), llvm::TargetFrameLowering::hasReservedCallFrame(), I, llvm::isUInt(), llvm_unreachable, MBB, Opc, SPReg, and TII.

◆ emitCSRSpillRestores()

void SIFrameLowering::emitCSRSpillRestores	(	MachineFunction &	MF,
		MachineBasicBlock &	MBB,
		MachineBasicBlock::iterator	MBBI,
		DebugLoc &	DL,
		LiveRegUnits &	LiveUnits,
		Register	FrameReg,
		Register	FramePtrRegScratchCopy ) const

Definition at line 1087 of file SIFrameLowering.cpp.

References llvm::MachineInstrBuilder::addImm(), llvm::MachineInstrBuilder::addReg(), buildEpilogRestore(), llvm::BuildMI(), buildScratchExecCopy(), DL, llvm::SmallVectorTemplateCommon< T, typename >::empty(), llvm::AMDGPU::LaneMaskConstants::ExecReg, llvm::AMDGPU::LaneMaskConstants::get(), llvm::SIMachineFunctionInfo::getFrameOffsetReg(), llvm::MachineFunction::getInfo(), llvm::SIMachineFunctionInfo::getPrologEpilogSGPRSpills(), llvm::MachineFunction::getSubtarget(), llvm::SIMachineFunctionInfo::isWholeWaveFunction(), llvm::RegState::Kill, llvm_unreachable, MBB, MBBI, llvm::AMDGPU::LaneMaskConstants::MovOpc, llvm::PrologEpilogSGPRSpillBuilder::restore(), llvm::SIMachineFunctionInfo::splitWWMSpillRegisters(), TII, TRI, and llvm::AMDGPU::LaneMaskConstants::XorOpc.

Referenced by emitEpilogue().

◆ emitCSRSpillStores()

void SIFrameLowering::emitCSRSpillStores	(	MachineFunction &	MF,
		MachineBasicBlock &	MBB,
		MachineBasicBlock::iterator	MBBI,
		DebugLoc &	DL,
		LiveRegUnits &	LiveUnits,
		Register	FrameReg,
		Register	FramePtrRegScratchCopy ) const

Definition at line 979 of file SIFrameLowering.cpp.

References llvm::MachineInstrBuilder::addImm(), llvm::LiveRegUnits::addReg(), llvm::MachineInstrBuilder::addReg(), llvm::BuildMI(), buildPrologSpill(), buildScratchExecCopy(), DL, llvm::LiveRegUnits::empty(), llvm::SmallVectorTemplateCommon< T, typename >::empty(), llvm::AMDGPU::LaneMaskConstants::ExecReg, llvm::AMDGPU::LaneMaskConstants::get(), llvm::SIMachineFunctionInfo::getAllScratchSGPRCopyDstRegs(), llvm::SIMachineFunctionInfo::getFrameOffsetReg(), llvm::MachineFunction::getInfo(), llvm::SIMachineFunctionInfo::getPrologEpilogSGPRSpills(), llvm::MachineFunction::getRegInfo(), llvm::MachineFunction::getSubtarget(), llvm::SIMachineFunctionInfo::isWholeWaveFunction(), llvm::RegState::Kill, llvm::make_first_range(), MBB, MBBI, llvm::AMDGPU::LaneMaskConstants::MovOpc, MRI, llvm::PrologEpilogSGPRSpillBuilder::save(), llvm::SIMachineFunctionInfo::splitWWMSpillRegisters(), TII, and TRI.

Referenced by emitPrologue().

◆ emitEntryFunctionPrologue()

void SIFrameLowering::emitEntryFunctionPrologue	(	MachineFunction &	MF,
		MachineBasicBlock &	MBB ) const

Definition at line 596 of file SIFrameLowering.cpp.

Referenced by emitPrologue().

◆ emitEpilogue()

void SIFrameLowering::emitEpilogue	(	MachineFunction &	MF,
		MachineBasicBlock &	MBB ) const

overridevirtual

Implements llvm::TargetFrameLowering.

Definition at line 1343 of file SIFrameLowering.cpp.

References llvm::LiveRegUnits::addReg(), llvm::MachineInstrBuilder::addReg(), llvm::BuildMI(), DL, emitCSRSpillRestores(), findScratchNonCalleeSaveRegister(), llvm::MachineInstr::FrameDestroy, llvm::MachineFunction::getFrameInfo(), llvm::SIMachineFunctionInfo::getFrameOffsetReg(), llvm::MachineFunction::getInfo(), llvm::MachineFrameInfo::getMaxAlign(), llvm::MachineFunction::getRegInfo(), llvm::SIMachineFunctionInfo::getScratchSGPRCopyDstReg(), llvm::SIMachineFunctionInfo::getStackPtrOffsetReg(), llvm::MachineFrameInfo::getStackSize(), llvm::MachineFunction::getSubtarget(), llvm::TargetFrameLowering::hasFP(), llvm::SIMachineFunctionInfo::hasPrologEpilogSGPRSpillEntry(), initLiveUnits(), llvm::AMDGPUMachineFunction::isChainFunction(), llvm::AMDGPUMachineFunction::isEntryFunction(), llvm::SIMachineFunctionInfo::isStackRealigned(), MBB, MBBI, MRI, llvm::report_fatal_error(), llvm::MachineInstrBuilder::setMIFlag(), TII, TRI, and llvm::Align::value().

◆ emitPrologue()

void SIFrameLowering::emitPrologue	(	MachineFunction &	MF,
		MachineBasicBlock &	MBB ) const

overridevirtual

emitProlog/emitEpilog - These methods insert prolog and epilog code into the function.

Implements llvm::TargetFrameLowering.

Definition at line 1191 of file SIFrameLowering.cpp.

References llvm::Add, llvm::MachineInstrBuilder::addImm(), llvm::LiveRegUnits::addLiveIns(), llvm::LiveRegUnits::addReg(), llvm::MachineInstrBuilder::addReg(), assert(), llvm::BuildMI(), DL, emitCSRSpillStores(), emitEntryFunctionPrologue(), llvm::LiveRegUnits::empty(), EnableSpillVGPRToAGPR, findScratchNonCalleeSaveRegister(), llvm::MachineInstr::FrameSetup, llvm::MachineFunction::getFrameInfo(), llvm::SIMachineFunctionInfo::getFrameOffsetReg(), llvm::MachineFunction::getInfo(), llvm::MachineFrameInfo::getMaxAlign(), llvm::SIMachineFunctionInfo::getPrologEpilogSGPRSaveRestoreInfo(), llvm::MachineFunction::getRegInfo(), getScratchScaleFactor(), llvm::SIMachineFunctionInfo::getScratchSGPRCopyDstReg(), llvm::SIMachineFunctionInfo::getStackPtrOffsetReg(), llvm::MachineFrameInfo::getStackSize(), llvm::MachineFunction::getSubtarget(), llvm::TargetFrameLowering::hasFP(), llvm::SIMachineFunctionInfo::hasPrologEpilogSGPRSpillEntry(), llvm::LiveRegUnits::init(), initLiveUnits(), llvm::AMDGPUMachineFunction::isChainFunction(), llvm::AMDGPUMachineFunction::isEntryFunction(), llvm::RegState::Kill, MBB, MBBI, MRI, Register, llvm::LiveRegUnits::removeReg(), llvm::report_fatal_error(), requiresStackPointerReference(), llvm::PrologEpilogSGPRSpillBuilder::save(), llvm::SIMachineFunctionInfo::setIsStackRealigned(), llvm::MachineInstrBuilder::setMIFlag(), TII, TRI, and llvm::Align::value().

◆ getFrameIndexReference()

StackOffset SIFrameLowering::getFrameIndexReference	(	const MachineFunction &	MF,
		int	FI,
		Register &	FrameReg ) const

overridevirtual

getFrameIndexReference - This method should return the base register and offset used to reference a frame index location.

Returns the displacement from the frame register to the stack frame of the specified index, along with the frame register used (in output arg FrameReg).

The offset is returned directly, and the base register is returned via FrameReg.

This is the default implementation which is overridden for some targets.

Reimplemented from llvm::TargetFrameLowering.

Definition at line 1445 of file SIFrameLowering.cpp.

References llvm::StackOffset::getFixed(), llvm::MachineFunction::getFrameInfo(), llvm::SIRegisterInfo::getFrameRegister(), llvm::MachineFrameInfo::getObjectOffset(), and llvm::MachineFunction::getSubtarget().

◆ hasFPImpl()

bool SIFrameLowering::hasFPImpl ( const MachineFunction & MF ) const

overrideprotectedvirtual

Implements llvm::TargetFrameLowering.

Definition at line 2153 of file SIFrameLowering.cpp.

References llvm::TargetOptions::DisableFramePointerElim(), frameTriviallyRequiresSP(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getInfo(), llvm::MachineFrameInfo::getStackSize(), llvm::MachineFunction::getSubtarget(), llvm::MachineFunction::getTarget(), llvm::MachineFrameInfo::hasCalls(), llvm::AMDGPUMachineFunction::isChainFunction(), llvm::AMDGPUMachineFunction::isEntryFunction(), llvm::MachineFrameInfo::isFrameAddressTaken(), mayReserveScratchForCWSR(), and llvm::TargetMachine::Options.

◆ isSupportedStackID()

bool SIFrameLowering::isSupportedStackID ( TargetStackID::Value ID ) const

overridevirtual

Reimplemented from llvm::TargetFrameLowering.

Definition at line 920 of file SIFrameLowering.cpp.

References llvm::TargetStackID::Default, llvm_unreachable, llvm::TargetStackID::NoAlloc, llvm::TargetStackID::ScalableVector, llvm::TargetStackID::SGPRSpill, and llvm::TargetStackID::WasmLocal.

◆ mayReserveScratchForCWSR()

bool SIFrameLowering::mayReserveScratchForCWSR ( const MachineFunction & MF ) const

Definition at line 2176 of file SIFrameLowering.cpp.

References llvm::Function::getCallingConv(), llvm::MachineFunction::getFunction(), llvm::MachineFunction::getInfo(), llvm::AMDGPU::isCompute(), and llvm::AMDGPU::isEntryFunctionCC().

Referenced by emitEntryFunctionPrologue(), and hasFPImpl().

◆ processFunctionBeforeFrameFinalized()

void SIFrameLowering::processFunctionBeforeFrameFinalized	(	MachineFunction &	MF,
		RegScavenger *	RS = nullptr ) const

overridevirtual

processFunctionBeforeFrameFinalized - This method is called immediately before the specified function's frame layout (MF.getFrameInfo()) is finalized.

Once the frame is finalized, MO_FrameIndex operands are replaced with direct constants. This method is optional.

Reimplemented from llvm::TargetFrameLowering.

Definition at line 1454 of file SIFrameLowering.cpp.

References llvm::RegScavenger::addScavengingFrameIndex(), allocateScavengingFrameIndexesNearIncomingSP(), llvm::SIMachineFunctionInfo::allocateVGPRSpillToAGPR(), allSGPRSpillsAreDead(), allStackObjectsAreDead(), assert(), llvm::RegScavenger::backward(), llvm::MachineFrameInfo::CreateSpillStackObject(), llvm::BitVector::empty(), EnableSpillVGPRToAGPR, llvm::RegScavenger::enterBasicBlockEnd(), llvm::SIMachineFunctionInfo::getAGPRSpillVGPRs(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getInfo(), llvm::MachineFrameInfo::getObjectIndexEnd(), llvm::MachineFunction::getRegInfo(), llvm::SIMachineFunctionInfo::getScavengeFI(), llvm::MachineFunction::getSubtarget(), llvm::SIMachineFunctionInfo::getVGPRSpillAGPRs(), llvm::SIMachineFunctionInfo::hasSpilledVGPRs(), llvm::MachineFrameInfo::isFixedObjectIndex(), llvm::make_early_inc_range(), MBB, MI, MRI, Register, llvm::SIMachineFunctionInfo::removeDeadFrameIndices(), llvm::BitVector::set(), llvm::BitVector::set_bits(), llvm::SIMachineFunctionInfo::setVGPRToAGPRSpillDead(), llvm::BitVector::test(), TII, and TRI.

◆ processFunctionBeforeFrameIndicesReplaced()

void SIFrameLowering::processFunctionBeforeFrameIndicesReplaced	(	MachineFunction &	MF,
		RegScavenger *	RS = nullptr ) const

overridevirtual

processFunctionBeforeFrameIndicesReplaced - This method is called immediately before MO_FrameIndex operands are eliminated, but after the frame is finalized.

This method is optional.

Reimplemented from llvm::TargetFrameLowering.

Definition at line 1566 of file SIFrameLowering.cpp.

References llvm::MachineFunction::getInfo(), llvm::SIMachineFunctionInfo::getLongBranchReservedReg(), llvm::MachineFunction::getRegInfo(), llvm::MachineFunction::getSubtarget(), llvm::SIMachineFunctionInfo::getVGPRForAGPRCopy(), MRI, llvm::SIMachineFunctionInfo::setLongBranchReservedReg(), llvm::SIMachineFunctionInfo::setVGPRForAGPRCopy(), and TRI.

◆ requiresStackPointerReference()

bool SIFrameLowering::requiresStackPointerReference ( const MachineFunction & MF ) const

Definition at line 2190 of file SIFrameLowering.cpp.

References assert(), frameTriviallyRequiresSP(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getInfo(), llvm::MachineFrameInfo::hasCalls(), llvm::AMDGPUMachineFunction::isChainFunction(), and llvm::AMDGPUMachineFunction::isEntryFunction().

Referenced by emitEntryFunctionPrologue(), and emitPrologue().

◆ restoreCalleeSavedRegisters()

bool SIFrameLowering::restoreCalleeSavedRegisters	(	MachineBasicBlock &	MBB,
		MachineBasicBlock::iterator	MI,
		MutableArrayRef< CalleeSavedInfo >	CSI,
		const TargetRegisterInfo *	TRI ) const

overridevirtual

restoreCalleeSavedRegisters - Issues instruction(s) to restore all callee saved registers and returns true if it isn't possible / profitable to do so by issuing a series of load instructions via loadRegToStackSlot().

If it returns true, and any of the registers in CSI is not restored, it sets the corresponding Restored flag in CSI to false. Returns false otherwise.

Reimplemented from llvm::TargetFrameLowering.

Definition at line 2054 of file SIFrameLowering.cpp.

References llvm::MachineInstrBuilder::addFrameIndex(), llvm::MachineInstrBuilder::addImm(), llvm::SIRegisterInfo::addImplicitUsesForBlockCSRLoad(), llvm::MachineInstrBuilder::addMemOperand(), llvm::MachineInstrBuilder::addReg(), llvm::BuildMI(), llvm::TargetRegisterClass::contains(), llvm::MachinePointerInfo::getFixedStack(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getInfo(), llvm::MachineFunction::getMachineMemOperand(), llvm::SIMachineFunctionInfo::getMaskForVGPRBlockOps(), llvm::SIRegisterInfo::getRegClassForBlockOp(), llvm::SIMachineFunctionInfo::getStackPtrOffsetReg(), llvm::MachineFunction::getSubtarget(), llvm::SIMachineFunctionInfo::hasMaskForVGPRBlockOps(), MBB, MI, llvm::MachineMemOperand::MOLoad, llvm::TargetFrameLowering::restoreCalleeSavedRegister(), llvm::reverse(), TII, and TRI.

◆ spillCalleeSavedRegisters()

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

overridevirtual

spillCalleeSavedRegisters - Issues instruction(s) to spill all callee saved registers and returns true if it isn't possible / profitable to do so by issuing a series of store instructions via storeRegToStackSlot().

Returns false otherwise.

Reimplemented from llvm::TargetFrameLowering.

Definition at line 1999 of file SIFrameLowering.cpp.

References llvm::MachineInstrBuilder::addFrameIndex(), llvm::MachineInstrBuilder::addImm(), llvm::MachineInstrBuilder::addMemOperand(), llvm::MachineInstrBuilder::addReg(), llvm::BuildMI(), llvm::MachinePointerInfo::getFixedStack(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getInfo(), llvm::getKillRegState(), llvm::MachineFunction::getMachineMemOperand(), llvm::SIMachineFunctionInfo::getMaskForVGPRBlockOps(), llvm::MachineFrameInfo::getObjectAlign(), llvm::MachineFrameInfo::getObjectSize(), llvm::SIMachineFunctionInfo::getStackPtrOffsetReg(), llvm::MachineFunction::getSubtarget(), llvm::SIMachineFunctionInfo::hasMaskForVGPRBlockOps(), MBB, MI, llvm::MachineMemOperand::MOStore, llvm::SIMachineFunctionInfo::setHasSpilledVGPRs(), llvm::TargetFrameLowering::spillCalleeSavedRegister(), TII, and TRI.

The documentation for this class was generated from the following files:

lib/Target/AMDGPU/SIFrameLowering.h
lib/Target/AMDGPU/SIFrameLowering.cpp

Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ SIFrameLowering()

◆ ~SIFrameLowering()

Member Function Documentation

◆ allocateScavengingFrameIndexesNearIncomingSP()

◆ assignCalleeSavedSpillSlots() [1/2]

◆ assignCalleeSavedSpillSlots() [2/2]

◆ determineCalleeSaves()

◆ determineCalleeSavesSGPR()

◆ determinePrologEpilogSGPRSaves()

◆ eliminateCallFramePseudoInstr()

◆ emitCSRSpillRestores()

◆ emitCSRSpillStores()

◆ emitEntryFunctionPrologue()

◆ emitEpilogue()

◆ emitPrologue()

◆ getFrameIndexReference()

◆ hasFPImpl()

◆ isSupportedStackID()

◆ mayReserveScratchForCWSR()

◆ processFunctionBeforeFrameFinalized()

◆ processFunctionBeforeFrameIndicesReplaced()

◆ requiresStackPointerReference()

◆ restoreCalleeSavedRegisters()

◆ spillCalleeSavedRegisters()