FunctionLoweringInfo - This contains information that is global to a function that is used when lowering a region of the function. More...

#include "llvm/CodeGen/FunctionLoweringInfo.h"

Collaboration diagram for llvm::FunctionLoweringInfo:

[legend]

Classes
struct	LiveOutInfo

struct	StatepointSpillMap
	Keep track of frame indices allocated for statepoints as they could be used across basic block boundaries. More...

Public Types
using	SwiftErrorValues = SmallVector< const Value *, 1 >

Public Member Functions
unsigned	getOrCreateSwiftErrorVReg (const MachineBasicBlock , const Value )
	Get or create the swifterror value virtual register in SwiftErrorVRegDefMap for this basic block. More...

void	setCurrentSwiftErrorVReg (const MachineBasicBlock MBB, const Value , unsigned)
	Set the swifterror virtual register in the SwiftErrorVRegDefMap for this basic block. More...

std::pair< unsigned, bool >	getOrCreateSwiftErrorVRegDefAt (const Instruction *)
	Get or create the swifterror value virtual register for a def of a swifterror by an instruction. More...

std::pair< unsigned, bool >	getOrCreateSwiftErrorVRegUseAt (const Instruction , const MachineBasicBlock , const Value *)

const Value *	getValueFromVirtualReg (unsigned Vreg)
	This method is called from TargetLowerinInfo::isSDNodeSourceOfDivergence to get the Value corresponding to the live-in virtual register. More...

void	set (const Function &Fn, MachineFunction &MF, SelectionDAG *DAG)
	set - Initialize this FunctionLoweringInfo with the given Function and its associated MachineFunction. More...

void	clear ()
	clear - Clear out all the function-specific state. More...

bool	isExportedInst (const Value *V)
	isExportedInst - Return true if the specified value is an instruction exported from its block. More...

unsigned	CreateReg (MVT VT)
	CreateReg - Allocate a single virtual register for the given type. More...

unsigned	CreateRegs (Type *Ty)
	CreateRegs - Allocate the appropriate number of virtual registers of the correctly promoted or expanded types. More...

unsigned	InitializeRegForValue (const Value *V)

const LiveOutInfo *	GetLiveOutRegInfo (unsigned Reg)
	GetLiveOutRegInfo - Gets LiveOutInfo for a register, returning NULL if the register is a PHI destination and the PHI's LiveOutInfo is not valid. More...

const LiveOutInfo *	GetLiveOutRegInfo (unsigned Reg, unsigned BitWidth)
	GetLiveOutRegInfo - Gets LiveOutInfo for a register, returning NULL if the register is a PHI destination and the PHI's LiveOutInfo is not valid. More...

void	AddLiveOutRegInfo (unsigned Reg, unsigned NumSignBits, const KnownBits &Known)
	AddLiveOutRegInfo - Adds LiveOutInfo for a register. More...

void	ComputePHILiveOutRegInfo (const PHINode *)
	ComputePHILiveOutRegInfo - Compute LiveOutInfo for a PHI's destination register based on the LiveOutInfo of its operands. More...

void	InvalidatePHILiveOutRegInfo (const PHINode *PN)
	InvalidatePHILiveOutRegInfo - Invalidates a PHI's LiveOutInfo, to be called when a block is visited before all of its predecessors. More...

void	setArgumentFrameIndex (const Argument *A, int FI)
	setArgumentFrameIndex - Record frame index for the byval argument. More...

int	getArgumentFrameIndex (const Argument *A)
	getArgumentFrameIndex - Get frame index for the byval argument. More...

unsigned	getCatchPadExceptionPointerVReg (const Value CPI, const TargetRegisterClass RC)

Public Attributes
const Function *	Fn

MachineFunction *	MF

const TargetLowering *	TLI

MachineRegisterInfo *	RegInfo

BranchProbabilityInfo *	BPI

bool	CanLowerReturn
	CanLowerReturn - true iff the function's return value can be lowered to registers. More...

bool	SplitCSR
	True if part of the CSRs will be handled via explicit copies. More...

unsigned	DemoteRegister
	DemoteRegister - if CanLowerReturn is false, DemoteRegister is a vreg allocated to hold a pointer to the hidden sret parameter. More...

DenseMap< const BasicBlock , MachineBasicBlock >	MBBMap
	MBBMap - A mapping from LLVM basic blocks to their machine code entry. More...

DenseMap< std::pair< const MachineBasicBlock , const Value >, unsigned >	SwiftErrorVRegDefMap
	A map from swifterror value in a basic block to the virtual register it is currently represented by. More...

DenseMap< std::pair< const MachineBasicBlock , const Value >, unsigned >	SwiftErrorVRegUpwardsUse
	A list of upward exposed vreg uses that need to be satisfied by either a copy def or a phi node at the beginning of the basic block representing the predecessor(s) swifterror value. More...

llvm::DenseMap< PointerIntPair< const Instruction *, 1, bool >, unsigned >	SwiftErrorVRegDefUses
	A map from instructions that define/use a swifterror value to the virtual register that represents that def/use. More...

const Value *	SwiftErrorArg
	The swifterror argument of the current function. More...

SwiftErrorValues	SwiftErrorVals
	A function can only have a single swifterror argument. More...

DenseMap< const Value *, unsigned >	ValueMap
	ValueMap - Since we emit code for the function a basic block at a time, we must remember which virtual registers hold the values for cross-basic-block values. More...

DenseMap< unsigned, const Value * >	VirtReg2Value
	VirtReg2Value map is needed by the Divergence Analysis driven instruction selection. More...

DenseMap< const Value *, unsigned >	CatchPadExceptionPointers
	Track virtual registers created for exception pointers. More...

DenseMap< const Instruction *, StatepointSpillMap >	StatepointSpillMaps
	Maps gc.statepoint instructions to their corresponding StatepointSpillMap instances. More...

DenseMap< const AllocaInst *, int >	StaticAllocaMap
	StaticAllocaMap - Keep track of frame indices for fixed sized allocas in the entry block. More...

DenseMap< const Argument *, int >	ByValArgFrameIndexMap
	ByValArgFrameIndexMap - Keep track of frame indices for byval arguments. More...

SmallVector< MachineInstr *, 8 >	ArgDbgValues
	ArgDbgValues - A list of DBG_VALUE instructions created during isel for function arguments that are inserted after scheduling is completed. More...

DenseMap< unsigned, unsigned >	RegFixups
	RegFixups - Registers which need to be replaced after isel is done. More...

DenseSet< unsigned >	RegsWithFixups

SmallVector< unsigned, 50 >	StatepointStackSlots
	StatepointStackSlots - A list of temporary stack slots (frame indices) used to spill values at a statepoint. More...

MachineBasicBlock *	MBB
	MBB - The current block. More...

MachineBasicBlock::iterator	InsertPt
	MBB - The current insert position inside the current block. More...

DenseMap< const Value *, ISD::NodeType >	PreferredExtendType
	Record the preferred extend type (ISD::SIGN_EXTEND or ISD::ZERO_EXTEND) for a value. More...

SmallPtrSet< const BasicBlock *, 4 >	VisitedBBs
	VisitedBBs - The set of basic blocks visited thus far by instruction selection. More...

std::vector< std::pair< MachineInstr *, unsigned > >	PHINodesToUpdate
	PHINodesToUpdate - A list of phi instructions whose operand list will be updated after processing the current basic block. More...

unsigned	OrigNumPHINodesToUpdate

unsigned	ExceptionPointerVirtReg
	If the current MBB is a landing pad, the exception pointer and exception selector registers are copied into these virtual registers by SelectionDAGISel::PrepareEHLandingPad(). More...

unsigned	ExceptionSelectorVirtReg

Detailed Description

FunctionLoweringInfo - This contains information that is global to a function that is used when lowering a region of the function.

Definition at line 53 of file FunctionLoweringInfo.h.

Member Typedef Documentation

◆ SwiftErrorValues

using llvm::FunctionLoweringInfo::SwiftErrorValues = SmallVector<const Value*, 1>

Definition at line 93 of file FunctionLoweringInfo.h.

Member Function Documentation

◆ AddLiveOutRegInfo()

void llvm::FunctionLoweringInfo::AddLiveOutRegInfo	(	unsigned	Reg,
		unsigned	NumSignBits,
		const KnownBits &	Known
	)

inline

AddLiveOutRegInfo - Adds LiveOutInfo for a register.

Definition at line 274 of file FunctionLoweringInfo.h.

References ComputePHILiveOutRegInfo(), llvm::KnownBits::isUnknown(), llvm::FunctionLoweringInfo::LiveOutInfo::Known, llvm::FunctionLoweringInfo::LiveOutInfo::NumSignBits, llvm::KnownBits::One, Reg, and llvm::KnownBits::Zero.

◆ clear()

void FunctionLoweringInfo::clear ( )

clear - Clear out all the function-specific state.

This returns this FunctionLoweringInfo to an empty state, ready to be used for a different function.

Definition at line 338 of file FunctionLoweringInfo.cpp.

References ArgDbgValues, ByValArgFrameIndexMap, llvm::detail::DenseSetImpl< ValueT, MapTy, ValueInfoT >::clear(), llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::clear(), llvm::ValueMap< KeyT, ValueT, Config >::clear(), llvm::SmallVectorImpl< T >::clear(), MBBMap, PreferredExtendType, RegFixups, RegsWithFixups, StatepointSpillMaps, StatepointStackSlots, StaticAllocaMap, VirtReg2Value, and VisitedBBs.

Referenced by llvm::SelectionDAGISel::runOnMachineFunction().

◆ ComputePHILiveOutRegInfo()

void FunctionLoweringInfo::ComputePHILiveOutRegInfo ( const PHINode * PN )

ComputePHILiveOutRegInfo - Compute LiveOutInfo for a PHI's destination register based on the LiveOutInfo of its operands.

Definition at line 411 of file FunctionLoweringInfo.cpp.

References assert(), llvm::ComputeValueVTs(), llvm::ValueMap< KeyT, ValueT, Config >::count(), llvm::APInt::getBitWidth(), llvm::Value::getContext(), llvm::MachineFunction::getDataLayout(), llvm::PHINode::getIncomingValue(), GetLiveOutRegInfo(), llvm::PHINode::getNumIncomingValues(), llvm::TargetLoweringBase::getNumRegisters(), llvm::APInt::getNumSignBits(), llvm::EVT::getSizeInBits(), llvm::Value::getType(), llvm::TargetLoweringBase::getTypeToTransformTo(), llvm::Type::isIntegerTy(), llvm::FunctionLoweringInfo::LiveOutInfo::IsValid, llvm::Type::isVectorTy(), llvm::TargetRegisterInfo::isVirtualRegister(), llvm::FunctionLoweringInfo::LiveOutInfo::Known, MF, llvm::FunctionLoweringInfo::LiveOutInfo::NumSignBits, llvm::KnownBits::One, llvm::SmallVectorBase::size(), TLI, llvm::KnownBits::Zero, and llvm::APInt::zextOrTrunc().

Referenced by AddLiveOutRegInfo().

◆ CreateReg()

unsigned FunctionLoweringInfo::CreateReg ( MVT VT )

CreateReg - Allocate a single virtual register for the given type.

Definition at line 355 of file FunctionLoweringInfo.cpp.

References llvm::MachineRegisterInfo::createVirtualRegister(), llvm::TargetLoweringBase::getRegClassFor(), llvm::MachineFunction::getSubtarget(), llvm::TargetSubtargetInfo::getTargetLowering(), MF, and RegInfo.

Referenced by CreateRegs(), llvm::HexagonDAGToDAGISel::EmitFunctionEntryCode(), and isExportedInst().

◆ CreateRegs()

unsigned FunctionLoweringInfo::CreateRegs ( Type * Ty )

CreateRegs - Allocate the appropriate number of virtual registers of the correctly promoted or expanded types.

Assign these registers consecutive vreg numbers and return the first assigned number.

In the case that the given value has struct or array type, this function will assign registers for each member or element.

Definition at line 367 of file FunctionLoweringInfo.cpp.

References llvm::ComputeValueVTs(), CreateReg(), llvm::Type::getContext(), llvm::MachineFunction::getDataLayout(), llvm::TargetLoweringBase::getNumRegisters(), llvm::TargetLoweringBase::getRegisterType(), llvm::MachineFunction::getSubtarget(), llvm::TargetSubtargetInfo::getTargetLowering(), MF, llvm::SmallVectorBase::size(), and TLI.

Referenced by InitializeRegForValue(), and isExportedInst().

◆ getArgumentFrameIndex()

int FunctionLoweringInfo::getArgumentFrameIndex ( const Argument * A )

getArgumentFrameIndex - Get frame index for the byval argument.

If the argument does not have any assigned frame index then 0 is returned.

Definition at line 510 of file FunctionLoweringInfo.cpp.

References ByValArgFrameIndexMap, llvm::dbgs(), I, and LLVM_DEBUG.

Referenced by InvalidatePHILiveOutRegInfo(), lowerStatepointMetaArgs(), and processDbgDeclares().

◆ getCatchPadExceptionPointerVReg()

unsigned FunctionLoweringInfo::getCatchPadExceptionPointerVReg	(	const Value *	CPI,
		const TargetRegisterClass *	RC
	)

Definition at line 518 of file FunctionLoweringInfo.cpp.

References assert(), CatchPadExceptionPointers, llvm::MachineRegisterInfo::createVirtualRegister(), llvm::MachineFunction::getRegInfo(), I, llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::insert(), MF, and MRI.

Referenced by InvalidatePHILiveOutRegInfo(), and mapWasmLandingPadIndex().

◆ GetLiveOutRegInfo() [1/2]

const LiveOutInfo* llvm::FunctionLoweringInfo::GetLiveOutRegInfo ( unsigned Reg )

inline

GetLiveOutRegInfo - Gets LiveOutInfo for a register, returning NULL if the register is a PHI destination and the PHI's LiveOutInfo is not valid.

Definition at line 255 of file FunctionLoweringInfo.h.

References llvm::FunctionLoweringInfo::LiveOutInfo::IsValid, and Reg.

Referenced by ComputePHILiveOutRegInfo(), and llvm::RegsForValue::getCopyFromRegs().

◆ GetLiveOutRegInfo() [2/2]

const FunctionLoweringInfo::LiveOutInfo * FunctionLoweringInfo::GetLiveOutRegInfo	(	unsigned	Reg,
		unsigned	BitWidth
	)

GetLiveOutRegInfo - Gets LiveOutInfo for a register, returning NULL if the register is a PHI destination and the PHI's LiveOutInfo is not valid.

If the register's LiveOutInfo is for a smaller bit width, it is extended to the larger bit width by zero extension. The bit width must be no smaller than the LiveOutInfo's existing bit width.

Definition at line 393 of file FunctionLoweringInfo.cpp.

References llvm::KnownBits::getBitWidth(), llvm::FunctionLoweringInfo::LiveOutInfo::IsValid, llvm::FunctionLoweringInfo::LiveOutInfo::Known, llvm::FunctionLoweringInfo::LiveOutInfo::NumSignBits, Reg, and llvm::KnownBits::zextOrTrunc().

◆ getOrCreateSwiftErrorVReg()

unsigned FunctionLoweringInfo::getOrCreateSwiftErrorVReg	(	const MachineBasicBlock *	MBB,
		const Value *	Val
	)

Get or create the swifterror value virtual register in SwiftErrorVRegDefMap for this basic block.

Definition at line 530 of file FunctionLoweringInfo.cpp.

References llvm::MachineRegisterInfo::createVirtualRegister(), llvm::MachineFunction::getDataLayout(), llvm::TargetLoweringBase::getPointerTy(), llvm::TargetLoweringBase::getRegClassFor(), llvm::MachineFunction::getRegInfo(), MF, SwiftErrorVRegDefMap, SwiftErrorVRegUpwardsUse, and TLI.

Referenced by getOrCreateSwiftErrorVRegUseAt(), and propagateSwiftErrorVRegs().

◆ getOrCreateSwiftErrorVRegDefAt()

std::pair< unsigned, bool > FunctionLoweringInfo::getOrCreateSwiftErrorVRegDefAt ( const Instruction * I )

Get or create the swifterror value virtual register for a def of a swifterror by an instruction.

Definition at line 554 of file FunctionLoweringInfo.cpp.

References llvm::MachineRegisterInfo::createVirtualRegister(), llvm::MachineFunction::getDataLayout(), llvm::TargetLoweringBase::getPointerTy(), llvm::TargetLoweringBase::getRegClassFor(), llvm::MachineFunction::getRegInfo(), I, MF, SwiftErrorVRegDefUses, and TLI.

◆ getOrCreateSwiftErrorVRegUseAt()

std::pair< unsigned, bool > FunctionLoweringInfo::getOrCreateSwiftErrorVRegUseAt	(	const Instruction *	I,
		const MachineBasicBlock *	MBB,
		const Value *	Val
	)

Definition at line 568 of file FunctionLoweringInfo.cpp.

References getOrCreateSwiftErrorVReg(), I, and SwiftErrorVRegDefUses.

◆ getValueFromVirtualReg()

const Value * FunctionLoweringInfo::getValueFromVirtualReg ( unsigned Vreg )

This method is called from TargetLowerinInfo::isSDNodeSourceOfDivergence to get the Value corresponding to the live-in virtual register.

Definition at line 580 of file FunctionLoweringInfo.cpp.

References llvm::SmallVectorImpl< T >::clear(), llvm::ComputeValueVTs(), Fn, llvm::Function::getContext(), llvm::Module::getDataLayout(), llvm::TargetLoweringBase::getNumRegisters(), llvm::GlobalValue::getParent(), P, Reg, TLI, and VirtReg2Value.

Referenced by llvm::SITargetLowering::isSDNodeSourceOfDivergence().

◆ InitializeRegForValue()

unsigned llvm::FunctionLoweringInfo::InitializeRegForValue ( const Value * V )

inline

Definition at line 243 of file FunctionLoweringInfo.h.

References assert(), CreateRegs(), llvm::DenseMapBase< DenseMap< KeyT, ValueT, KeyInfoT, BucketT >, KeyT, ValueT, KeyInfoT, BucketT >::empty(), llvm::Value::getType(), and llvm::Type::isTokenTy().

Referenced by set().

◆ InvalidatePHILiveOutRegInfo()

void llvm::FunctionLoweringInfo::InvalidatePHILiveOutRegInfo ( const PHINode * PN )

inline

InvalidatePHILiveOutRegInfo - Invalidates a PHI's LiveOutInfo, to be called when a block is visited before all of its predecessors.

Definition at line 293 of file FunctionLoweringInfo.h.

References llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::end(), llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::find(), getArgumentFrameIndex(), getCatchPadExceptionPointerVReg(), llvm::DenseMap< KeyT, ValueT, KeyInfoT, BucketT >::grow(), Reg, and setArgumentFrameIndex().

◆ isExportedInst()

bool llvm::FunctionLoweringInfo::isExportedInst ( const Value * V )

inline

isExportedInst - Return true if the specified value is an instruction exported from its block.

Definition at line 235 of file FunctionLoweringInfo.h.

References llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::count(), CreateReg(), and CreateRegs().

Referenced by isFoldedOrDeadInstruction().

◆ set()

void FunctionLoweringInfo::set	(	const Function &	Fn,
		MachineFunction &	MF,
		SelectionDAG *	DAG
	)

set - Initialize this FunctionLoweringInfo with the given Function and its associated MachineFunction.

Definition at line 81 of file FunctionLoweringInfo.cpp.

References llvm::AMDGPU::HSAMD::Kernel::Arg::Key::Align, llvm::WinEHHandlerType::Alloca, assert(), llvm::BuildMI(), llvm::calculateClrEHStateNumbers(), llvm::calculateSEHStateNumbers(), llvm::calculateWasmEHInfo(), llvm::calculateWinCXXEHStateNumbers(), CanLowerReturn, llvm::WinEHHandlerType::CatchObj, llvm::classifyEHPersonality(), llvm::CxxUnwindMapEntry::Cleanup, llvm::DenseMapBase< DenseMap< KeyT, ValueT, KeyInfoT, BucketT >, KeyT, ValueT, KeyInfoT, BucketT >::clear(), llvm::WinEHFuncInfo::ClrEHUnwindMap, llvm::ComputeValueVTs(), llvm::CoreCLR, llvm::MachineFrameInfo::CreateFixedObject(), llvm::MachineFunction::CreateMachineBasicBlock(), llvm::MachineFrameInfo::CreateStackObject(), llvm::MachineFrameInfo::CreateVariableSizedObject(), llvm::WinEHFuncInfo::CxxUnwindMap, llvm::WasmEHFuncInfo::EHPadUnwindMap, llvm::DenseMapBase< DenseMap< KeyT, ValueT, KeyInfoT, BucketT >, KeyT, ValueT, KeyInfoT, BucketT >::end(), llvm::DenseMapBase< DenseMap< KeyT, ValueT, KeyInfoT, BucketT >, KeyT, ValueT, KeyInfoT, BucketT >::find(), first, Fn, llvm::ISD::FrameIndex, llvm::WinEHHandlerType::FrameIndex, llvm::MCInstrInfo::get(), llvm::PointerUnion< PT1, PT2 >::get(), llvm::Function::getAttributes(), llvm::CallSiteBase< FunTy, BBTy, ValTy, UserTy, UseTy, InstrTy, CallTy, InvokeTy, IterTy >::getCalledValue(), llvm::Function::getCallingConv(), llvm::Function::getContext(), llvm::MachineFunction::getDataLayout(), llvm::MachineFunction::getFrameInfo(), llvm::TargetSubtargetInfo::getFrameLowering(), llvm::TargetSubtargetInfo::getInstrInfo(), llvm::Function::getPersonalityFn(), getPreferredExtendForValue(), llvm::DataLayout::getPrefTypeAlignment(), llvm::MachineFunction::getRegInfo(), llvm::TargetSubtargetInfo::getRegisterInfo(), llvm::GetReturnInfo(), llvm::Function::getReturnType(), llvm::TargetFrameLowering::getStackAlignment(), llvm::MachineFunction::getSubtarget(), llvm::TargetSubtargetInfo::getTargetLowering(), llvm::DataLayout::getTypeAllocSize(), llvm::MachineFunction::getWasmEHFuncInfo(), llvm::MachineFunction::getWinEHFuncInfo(), llvm::ConstantInt::getZExtValue(), H, llvm::SEHUnwindMapEntry::Handler, llvm::WinEHHandlerType::Handler, llvm::ClrEHUnwindMapEntry::Handler, llvm::WinEHTryBlockMapEntry::HandlerArray, llvm::Function::hasPersonalityFn(), I, InitializeRegForValue(), llvm::DenseMapBase< DenseMap< KeyT, ValueT, KeyInfoT, BucketT >, KeyT, ValueT, KeyInfoT, BucketT >::insert(), llvm::isAsynchronousEHPersonality(), llvm::InlineAsm::isClobber, llvm::isFuncletEHPersonality(), llvm::TargetFrameLowering::isStackRealignable(), isUsedOutsideOfDefiningBlock(), llvm::Function::isVarArg(), llvm::max(), MBB, MBBMap, MF, llvm::MSVC_CXX, PreferredExtendType, llvm::MachineFunction::push_back(), RegInfo, llvm::WinEHFuncInfo::SEHUnwindMap, llvm::MachineBasicBlock::setHasAddressTaken(), llvm::MachineFunction::setHasEHFunclets(), llvm::MachineFunction::setHasEHScopes(), llvm::MachineFrameInfo::setHasMustTailInVarArgFunc(), llvm::MachineFrameInfo::setHasOpaqueSPAdjustment(), llvm::MachineFrameInfo::setHasVAStart(), llvm::MachineBasicBlock::setIsEHPad(), llvm::MachineFrameInfo::setObjectAlignment(), StaticAllocaMap, llvm::WasmEHFuncInfo::ThrowUnwindMap, TII, TLI, TRI, llvm::WinEHFuncInfo::TryBlockMap, llvm::Intrinsic::vastart, and llvm::Wasm_CXX.

Referenced by llvm::SelectionDAGISel::runOnMachineFunction().

◆ setArgumentFrameIndex()

void FunctionLoweringInfo::setArgumentFrameIndex	(	const Argument *	A,
		int	FI
	)

setArgumentFrameIndex - Record frame index for the byval argument.

This overrides previous frame index entry for this argument, if any.

Definition at line 502 of file FunctionLoweringInfo.cpp.

References ByValArgFrameIndexMap.

Referenced by InvalidatePHILiveOutRegInfo().

◆ setCurrentSwiftErrorVReg()

void FunctionLoweringInfo::setCurrentSwiftErrorVReg	(	const MachineBasicBlock *	MBB,
		const Value *	Val,
		unsigned	VReg
	)

Set the swifterror virtual register in the SwiftErrorVRegDefMap for this basic block.

Definition at line 548 of file FunctionLoweringInfo.cpp.

References SwiftErrorVRegDefMap.

Referenced by createSwiftErrorEntriesInEntryBlock(), and propagateSwiftErrorVRegs().

Member Data Documentation

◆ ArgDbgValues

SmallVector<MachineInstr*, 8> llvm::FunctionLoweringInfo::ArgDbgValues

ArgDbgValues - A list of DBG_VALUE instructions created during isel for function arguments that are inserted after scheduling is completed.

Definition at line 176 of file FunctionLoweringInfo.h.

Referenced by clear(), and llvm::SelectionDAGISel::runOnMachineFunction().

◆ BPI

BranchProbabilityInfo* llvm::FunctionLoweringInfo::BPI

Definition at line 59 of file FunctionLoweringInfo.h.

Referenced by findUnwindDestinations(), getBranchHint(), and llvm::SelectionDAGISel::runOnMachineFunction().

◆ ByValArgFrameIndexMap

DenseMap<const Argument*, int> llvm::FunctionLoweringInfo::ByValArgFrameIndexMap

ByValArgFrameIndexMap - Keep track of frame indices for byval arguments.

Definition at line 172 of file FunctionLoweringInfo.h.

Referenced by clear(), getArgumentFrameIndex(), and setArgumentFrameIndex().

◆ CanLowerReturn

bool llvm::FunctionLoweringInfo::CanLowerReturn

CanLowerReturn - true iff the function's return value can be lowered to registers.

Definition at line 62 of file FunctionLoweringInfo.h.

Referenced by set().

◆ CatchPadExceptionPointers

DenseMap<const Value *, unsigned> llvm::FunctionLoweringInfo::CatchPadExceptionPointers

Track virtual registers created for exception pointers.

Definition at line 133 of file FunctionLoweringInfo.h.

Referenced by getCatchPadExceptionPointerVReg().

◆ DemoteRegister

unsigned llvm::FunctionLoweringInfo::DemoteRegister

DemoteRegister - if CanLowerReturn is false, DemoteRegister is a vreg allocated to hold a pointer to the hidden sret parameter.

Definition at line 69 of file FunctionLoweringInfo.h.

Referenced by llvm::SITargetLowering::isSDNodeSourceOfDivergence().

◆ ExceptionPointerVirtReg

unsigned llvm::FunctionLoweringInfo::ExceptionPointerVirtReg

If the current MBB is a landing pad, the exception pointer and exception selector registers are copied into these virtual registers by SelectionDAGISel::PrepareEHLandingPad().

Definition at line 221 of file FunctionLoweringInfo.h.

Referenced by mapWasmLandingPadIndex().

◆ ExceptionSelectorVirtReg

unsigned llvm::FunctionLoweringInfo::ExceptionSelectorVirtReg

Definition at line 221 of file FunctionLoweringInfo.h.

Referenced by mapWasmLandingPadIndex().

◆ Fn

const Function* llvm::FunctionLoweringInfo::Fn

Definition at line 55 of file FunctionLoweringInfo.h.

Referenced by llvm::FastISel::fastEmit_ri_(), findArgumentCopyElisionCandidates(), findUnwindDestinations(), getBranchHint(), getValueFromVirtualReg(), llvm::SITargetLowering::isSDNodeSourceOfDivergence(), mapWasmLandingPadIndex(), processDbgDeclares(), and set().

◆ InsertPt

MachineBasicBlock::iterator llvm::FunctionLoweringInfo::InsertPt

MBB - The current insert position inside the current block.

Definition at line 193 of file FunctionLoweringInfo.h.

◆ MBB

◆ MBBMap

DenseMap<const BasicBlock*, MachineBasicBlock *> llvm::FunctionLoweringInfo::MBBMap

MBBMap - A mapping from LLVM basic blocks to their machine code entry.

Definition at line 72 of file FunctionLoweringInfo.h.

Referenced by llvm::FastISel::canFoldAddIntoGEP(), clear(), llvm::FastISel::fastEmitZExtFromI1(), findUnwindDestinations(), and set().

◆ OrigNumPHINodesToUpdate

unsigned llvm::FunctionLoweringInfo::OrigNumPHINodesToUpdate

Definition at line 216 of file FunctionLoweringInfo.h.

Referenced by llvm::FastISel::fastEmitZExtFromI1().

◆ PHINodesToUpdate

std::vector<std::pair<MachineInstr*, unsigned> > llvm::FunctionLoweringInfo::PHINodesToUpdate

PHINodesToUpdate - A list of phi instructions whose operand list will be updated after processing the current basic block.

TODO: This isn't per-function state, it's per-basic-block state. But there's no other convenient place for it to live right now.

Definition at line 215 of file FunctionLoweringInfo.h.

Referenced by llvm::FastISel::fastEmitZExtFromI1(), and isRegUsedByPhiNodes().

◆ PreferredExtendType

DenseMap<const Value *, ISD::NodeType> llvm::FunctionLoweringInfo::PreferredExtendType

Record the preferred extend type (ISD::SIGN_EXTEND or ISD::ZERO_EXTEND) for a value.

Definition at line 205 of file FunctionLoweringInfo.h.

Referenced by clear(), and set().

◆ RegFixups

DenseMap<unsigned, unsigned> llvm::FunctionLoweringInfo::RegFixups

RegFixups - Registers which need to be replaced after isel is done.

Definition at line 179 of file FunctionLoweringInfo.h.

Referenced by clear(), and llvm::SelectionDAGISel::runOnMachineFunction().

◆ RegInfo

MachineRegisterInfo* llvm::FunctionLoweringInfo::RegInfo

Definition at line 58 of file FunctionLoweringInfo.h.

Referenced by CreateReg(), and set().

◆ RegsWithFixups

DenseSet<unsigned> llvm::FunctionLoweringInfo::RegsWithFixups

Definition at line 181 of file FunctionLoweringInfo.h.

Referenced by clear().

◆ SplitCSR

bool llvm::FunctionLoweringInfo::SplitCSR

True if part of the CSRs will be handled via explicit copies.

Definition at line 65 of file FunctionLoweringInfo.h.

Referenced by llvm::SelectionDAGISel::runOnMachineFunction().

◆ StatepointSpillMaps

DenseMap<const Instruction *, StatepointSpillMap> llvm::FunctionLoweringInfo::StatepointSpillMaps

Maps gc.statepoint instructions to their corresponding StatepointSpillMap instances.

Definition at line 164 of file FunctionLoweringInfo.h.

Referenced by clear(), findPreviousSpillSlot(), and lowerStatepointMetaArgs().

◆ StatepointStackSlots

SmallVector<unsigned, 50> llvm::FunctionLoweringInfo::StatepointStackSlots

StatepointStackSlots - A list of temporary stack slots (frame indices) used to spill values at a statepoint.

We store them here to enable reuse of the same stack slots across different statepoints in different basic blocks.

Definition at line 187 of file FunctionLoweringInfo.h.

Referenced by llvm::StatepointLoweringState::allocateStackSlot(), clear(), reservePreviousStackSlotForValue(), and llvm::StatepointLoweringState::startNewStatepoint().

◆ StaticAllocaMap

DenseMap<const AllocaInst*, int> llvm::FunctionLoweringInfo::StaticAllocaMap

StaticAllocaMap - Keep track of frame indices for fixed sized allocas in the entry block.

This allows the allocas to be efficiently referenced anywhere in the function.

Definition at line 169 of file FunctionLoweringInfo.h.

Referenced by clear(), findArgumentCopyElisionCandidates(), processDbgDeclares(), set(), and tryToElideArgumentCopy().

◆ SwiftErrorArg

const Value* llvm::FunctionLoweringInfo::SwiftErrorArg

The swifterror argument of the current function.

Definition at line 91 of file FunctionLoweringInfo.h.

Referenced by createSwiftErrorEntriesInEntryBlock(), and setupSwiftErrorVals().

◆ SwiftErrorVals

SwiftErrorValues llvm::FunctionLoweringInfo::SwiftErrorVals

A function can only have a single swifterror argument.

And if it does have a swifterror argument, it must be the first entry in SwiftErrorVals.

Definition at line 97 of file FunctionLoweringInfo.h.

Referenced by createSwiftErrorEntriesInEntryBlock(), preassignSwiftErrorRegs(), propagateSwiftErrorVRegs(), and setupSwiftErrorVals().

◆ SwiftErrorVRegDefMap

DenseMap<std::pair<const MachineBasicBlock *, const Value *>, unsigned> llvm::FunctionLoweringInfo::SwiftErrorVRegDefMap

A map from swifterror value in a basic block to the virtual register it is currently represented by.

Definition at line 77 of file FunctionLoweringInfo.h.

Referenced by getOrCreateSwiftErrorVReg(), propagateSwiftErrorVRegs(), setCurrentSwiftErrorVReg(), and setupSwiftErrorVals().

◆ SwiftErrorVRegDefUses

llvm::DenseMap<PointerIntPair<const Instruction *, 1, bool>, unsigned> llvm::FunctionLoweringInfo::SwiftErrorVRegDefUses

A map from instructions that define/use a swifterror value to the virtual register that represents that def/use.

Definition at line 88 of file FunctionLoweringInfo.h.

Referenced by getOrCreateSwiftErrorVRegDefAt(), getOrCreateSwiftErrorVRegUseAt(), and setupSwiftErrorVals().

◆ SwiftErrorVRegUpwardsUse

DenseMap<std::pair<const MachineBasicBlock *, const Value *>, unsigned> llvm::FunctionLoweringInfo::SwiftErrorVRegUpwardsUse

A list of upward exposed vreg uses that need to be satisfied by either a copy def or a phi node at the beginning of the basic block representing the predecessor(s) swifterror value.

Definition at line 83 of file FunctionLoweringInfo.h.

Referenced by getOrCreateSwiftErrorVReg(), propagateSwiftErrorVRegs(), and setupSwiftErrorVals().

◆ TLI

const TargetLowering* llvm::FunctionLoweringInfo::TLI

Definition at line 57 of file FunctionLoweringInfo.h.

Referenced by ComputePHILiveOutRegInfo(), CreateRegs(), getOrCreateSwiftErrorVReg(), getOrCreateSwiftErrorVRegDefAt(), getValueFromVirtualReg(), propagateSwiftErrorVRegs(), and set().

◆ ValueMap

DenseMap<const Value *, unsigned> llvm::FunctionLoweringInfo::ValueMap

ValueMap - Since we emit code for the function a basic block at a time, we must remember which virtual registers hold the values for cross-basic-block values.

Definition at line 119 of file FunctionLoweringInfo.h.

◆ VirtReg2Value

DenseMap<unsigned, const Value*> llvm::FunctionLoweringInfo::VirtReg2Value

VirtReg2Value map is needed by the Divergence Analysis driven instruction selection.

It is reverted ValueMap. It is computed in lazy style - on demand. It is used to get the Value corresponding to the live in virtual register and is called from the TargetLowerinInfo::isSDNodeSourceOfDivergence.

Definition at line 126 of file FunctionLoweringInfo.h.

Referenced by clear(), and getValueFromVirtualReg().

◆ VisitedBBs

SmallPtrSet<const BasicBlock*, 4> llvm::FunctionLoweringInfo::VisitedBBs

VisitedBBs - The set of basic blocks visited thus far by instruction selection.

Definition at line 209 of file FunctionLoweringInfo.h.

Referenced by clear().

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

include/llvm/CodeGen/FunctionLoweringInfo.h
lib/CodeGen/SelectionDAG/FunctionLoweringInfo.cpp

Classes

Public Types

Public Member Functions

Public Attributes

Detailed Description

Member Typedef Documentation

◆ SwiftErrorValues

Member Function Documentation

◆ AddLiveOutRegInfo()

◆ clear()

◆ ComputePHILiveOutRegInfo()

◆ CreateReg()

◆ CreateRegs()

◆ getArgumentFrameIndex()

◆ getCatchPadExceptionPointerVReg()

◆ GetLiveOutRegInfo() [1/2]

◆ GetLiveOutRegInfo() [2/2]

◆ getOrCreateSwiftErrorVReg()

◆ getOrCreateSwiftErrorVRegDefAt()

◆ getOrCreateSwiftErrorVRegUseAt()

◆ getValueFromVirtualReg()

◆ InitializeRegForValue()

◆ InvalidatePHILiveOutRegInfo()

◆ isExportedInst()

◆ set()

◆ setArgumentFrameIndex()

◆ setCurrentSwiftErrorVReg()

Member Data Documentation

◆ ArgDbgValues

◆ BPI

◆ ByValArgFrameIndexMap

◆ CanLowerReturn

◆ CatchPadExceptionPointers

◆ DemoteRegister

◆ ExceptionPointerVirtReg

◆ ExceptionSelectorVirtReg

◆ Fn

◆ InsertPt

◆ MBB

◆ MBBMap

◆ MF

◆ OrigNumPHINodesToUpdate

◆ PHINodesToUpdate

◆ PreferredExtendType

◆ RegFixups

◆ RegInfo

◆ RegsWithFixups

◆ SplitCSR

◆ StatepointSpillMaps

◆ StatepointStackSlots

◆ StaticAllocaMap

◆ SwiftErrorArg

◆ SwiftErrorVals

◆ SwiftErrorVRegDefMap

◆ SwiftErrorVRegDefUses

◆ SwiftErrorVRegUpwardsUse

◆ TLI

◆ ValueMap

◆ VirtReg2Value

◆ VisitedBBs