#include "SIFrameLowering.h"
#include "AMDGPU.h"
#include "GCNSubtarget.h"
#include "MCTargetDesc/AMDGPUMCTargetDesc.h"
#include "SIMachineFunctionInfo.h"
#include "llvm/CodeGen/LivePhysRegs.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/RegisterScavenging.h"
#include "llvm/Target/TargetMachine.h"

Include dependency graph for SIFrameLowering.cpp:

Macros
#define	DEBUG_TYPE "frame-info"

Functions
static MCRegister	findScratchNonCalleeSaveRegister (MachineRegisterInfo &MRI, LivePhysRegs &LiveRegs, const TargetRegisterClass &RC, bool Unused=false)

static void	getVGPRSpillLaneOrTempRegister (MachineFunction &MF, LivePhysRegs &LiveRegs, Register &TempSGPR, Optional< int > &FrameIndex, bool IsFP)

static void	buildPrologSpill (const GCNSubtarget &ST, const SIRegisterInfo &TRI, const SIMachineFunctionInfo &FuncInfo, LivePhysRegs &LiveRegs, MachineFunction &MF, MachineBasicBlock &MBB, MachineBasicBlock::iterator I, const DebugLoc &DL, Register SpillReg, int FI)

static void	buildEpilogRestore (const GCNSubtarget &ST, const SIRegisterInfo &TRI, const SIMachineFunctionInfo &FuncInfo, LivePhysRegs &LiveRegs, MachineFunction &MF, MachineBasicBlock &MBB, MachineBasicBlock::iterator I, const DebugLoc &DL, Register SpillReg, int FI)

static void	buildGitPtr (MachineBasicBlock &MBB, MachineBasicBlock::iterator I, const DebugLoc &DL, const SIInstrInfo *TII, Register TargetReg)

static bool	allStackObjectsAreDead (const MachineFrameInfo &MFI)

static unsigned	getScratchScaleFactor (const GCNSubtarget &ST)

static void	initLiveRegs (LivePhysRegs &LiveRegs, const SIRegisterInfo &TRI, const SIMachineFunctionInfo *FuncInfo, MachineFunction &MF, MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI, bool IsProlog)

static Register	buildScratchExecCopy (LivePhysRegs &LiveRegs, MachineFunction &MF, MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI, bool IsProlog)

static bool	spilledToMemory (const MachineFunction &MF, int SaveIndex)

static bool	allSGPRSpillsAreDead (const MachineFunction &MF)

static bool	frameTriviallyRequiresSP (const MachineFrameInfo &MFI)
	Returns true if the frame will require a reference to the stack pointer. More...

Variables
static cl::opt< bool >	EnableSpillVGPRToAGPR ("amdgpu-spill-vgpr-to-agpr", cl::desc("Enable spilling VGPRs to AGPRs"), cl::ReallyHidden, cl::init(true))

Macro Definition Documentation

◆ DEBUG_TYPE

#define DEBUG_TYPE "frame-info"

Definition at line 21 of file SIFrameLowering.cpp.

Function Documentation

◆ allSGPRSpillsAreDead()

static bool allSGPRSpillsAreDead ( const MachineFunction & MF )

static

Definition at line 1079 of file SIFrameLowering.cpp.

References llvm::SIMachineFunctionInfo::BasePointerSaveIndex, E, llvm::SIMachineFunctionInfo::FramePointerSaveIndex, llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getInfo(), llvm::MachineFrameInfo::getObjectIndexBegin(), llvm::MachineFrameInfo::getObjectIndexEnd(), llvm::MachineFrameInfo::getStackID(), I, llvm::MachineFrameInfo::isDeadObjectIndex(), and llvm::TargetStackID::SGPRSpill.

Referenced by llvm::SIFrameLowering::processFunctionBeforeFrameFinalized().

◆ allStackObjectsAreDead()

static bool allStackObjectsAreDead ( const MachineFrameInfo & MFI )

static

Definition at line 336 of file SIFrameLowering.cpp.

References E, llvm::MachineFrameInfo::getObjectIndexBegin(), llvm::MachineFrameInfo::getObjectIndexEnd(), I, and llvm::MachineFrameInfo::isDeadObjectIndex().

Referenced by llvm::SIFrameLowering::determineCalleeSaves(), llvm::SIFrameLowering::emitEntryFunctionPrologue(), and llvm::SIFrameLowering::processFunctionBeforeFrameFinalized().

◆ buildEpilogRestore()

static void buildEpilogRestore	(	const GCNSubtarget &	ST,
		const SIRegisterInfo &	TRI,
		const SIMachineFunctionInfo &	FuncInfo,
		LivePhysRegs &	LiveRegs,
		MachineFunction &	MF,
		MachineBasicBlock &	MBB,
		MachineBasicBlock::iterator	I,
		const DebugLoc &	DL,
		Register	SpillReg,
		int	FI
	)

static

Definition at line 145 of file SIFrameLowering.cpp.

References DL, llvm::MachinePointerInfo::getFixedStack(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getMachineMemOperand(), llvm::MachineFrameInfo::getObjectAlign(), llvm::MachineFrameInfo::getObjectSize(), llvm::SIMachineFunctionInfo::getStackPtrOffsetReg(), I, MBB, llvm::MachineMemOperand::MOLoad, llvm::ARM_MB::ST, and TRI.

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

◆ buildGitPtr()

static void buildGitPtr	(	MachineBasicBlock &	MBB,
		MachineBasicBlock::iterator	I,
		const DebugLoc &	DL,
		const SIInstrInfo *	TII,
		Register	TargetReg
	)

static

Definition at line 165 of file SIFrameLowering.cpp.

References llvm::MachineInstrBuilder::addImm(), llvm::MachineBasicBlock::addLiveIn(), llvm::MachineRegisterInfo::addLiveIn(), llvm::MachineInstrBuilder::addReg(), llvm::BuildMI(), DL, llvm::SIMachineFunctionInfo::getGITPtrHigh(), llvm::SIMachineFunctionInfo::getGITPtrLoReg(), llvm::MachineFunction::getInfo(), llvm::MachineBasicBlock::getParent(), llvm::MachineFunction::getRegInfo(), llvm::TargetRegisterInfo::getSubReg(), I, llvm::RegState::ImplicitDefine, MBB, TII, and TRI.

◆ buildPrologSpill()

static void buildPrologSpill	(	const GCNSubtarget &	ST,
		const SIRegisterInfo &	TRI,
		const SIMachineFunctionInfo &	FuncInfo,
		LivePhysRegs &	LiveRegs,
		MachineFunction &	MF,
		MachineBasicBlock &	MBB,
		MachineBasicBlock::iterator	I,
		const DebugLoc &	DL,
		Register	SpillReg,
		int	FI
	)

static

Definition at line 124 of file SIFrameLowering.cpp.

References llvm::LivePhysRegs::addReg(), DL, llvm::MachinePointerInfo::getFixedStack(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getMachineMemOperand(), llvm::MachineFrameInfo::getObjectAlign(), llvm::MachineFrameInfo::getObjectSize(), llvm::SIMachineFunctionInfo::getStackPtrOffsetReg(), I, MBB, llvm::MachineMemOperand::MOStore, llvm::LivePhysRegs::removeReg(), llvm::ARM_MB::ST, and TRI.

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

◆ buildScratchExecCopy()

static Register buildScratchExecCopy	(	LivePhysRegs &	LiveRegs,
		MachineFunction &	MF,
		MachineBasicBlock &	MBB,
		MachineBasicBlock::iterator	MBBI,
		bool	IsProlog
	)

static

◆ findScratchNonCalleeSaveRegister()

static MCRegister findScratchNonCalleeSaveRegister	(	MachineRegisterInfo &	MRI,
		LivePhysRegs &	LiveRegs,
		const TargetRegisterClass &	RC,
		bool	Unused = `false`
	)

static

Definition at line 33 of file SIFrameLowering.cpp.

References llvm::LivePhysRegs::addReg(), llvm::LivePhysRegs::available(), llvm::MachineRegisterInfo::getCalleeSavedRegs(), i, llvm::MachineRegisterInfo::isPhysRegUsed(), and MRI.

Referenced by buildScratchExecCopy(), llvm::SIFrameLowering::emitEpilogue(), llvm::SIFrameLowering::emitPrologue(), and getVGPRSpillLaneOrTempRegister().

◆ frameTriviallyRequiresSP()

static bool frameTriviallyRequiresSP ( const MachineFrameInfo & MFI )

static

Returns true if the frame will require a reference to the stack pointer.

This is the set of conditions common to setting up the stack pointer in a kernel, and for using a frame pointer in a callable function.

FIXME: Should also check hasOpaqueSPAdjustment and if any inline asm references SP.

Definition at line 1454 of file SIFrameLowering.cpp.

References llvm::MachineFrameInfo::hasPatchPoint(), llvm::MachineFrameInfo::hasStackMap(), and llvm::MachineFrameInfo::hasVarSizedObjects().

Referenced by llvm::SIFrameLowering::hasFP(), and llvm::SIFrameLowering::requiresStackPointerReference().

◆ getScratchScaleFactor()

static unsigned getScratchScaleFactor ( const GCNSubtarget & ST )

static

Definition at line 399 of file SIFrameLowering.cpp.

References llvm::ARM_MB::ST.

Referenced by llvm::SIFrameLowering::eliminateCallFramePseudoInstr(), llvm::SIFrameLowering::emitEntryFunctionPrologue(), llvm::SIFrameLowering::emitEpilogue(), and llvm::SIFrameLowering::emitPrologue().

◆ getVGPRSpillLaneOrTempRegister()

static void getVGPRSpillLaneOrTempRegister	(	MachineFunction &	MF,
		LivePhysRegs &	LiveRegs,
		Register &	TempSGPR,
		Optional< int > &	FrameIndex,
		bool	IsFP
	)

static

◆ initLiveRegs()

static void initLiveRegs	(	LivePhysRegs &	LiveRegs,
		const SIRegisterInfo &	TRI,
		const SIMachineFunctionInfo *	FuncInfo,
		MachineFunction &	MF,
		MachineBasicBlock &	MBB,
		MachineBasicBlock::iterator	MBBI,
		bool	IsProlog
	)