This struct represents the registers (physical or virtual) that a particular set of values is assigned, and the type information about the value. More...

#include "CodeGen/SelectionDAG/SelectionDAGBuilder.h"

Public Member Functions
	RegsForValue ()=default

	RegsForValue (const SmallVector< unsigned, 4 > &regs, MVT regvt, EVT valuevt, std::optional< CallingConv::ID > CC=std::nullopt)

	RegsForValue (LLVMContext &Context, const TargetLowering &TLI, const DataLayout &DL, unsigned Reg, Type *Ty, std::optional< CallingConv::ID > CC)

bool	isABIMangled () const

void	append (const RegsForValue &RHS)
	Add the specified values to this one.

SDValue	getCopyFromRegs (SelectionDAG &DAG, FunctionLoweringInfo &FuncInfo, const SDLoc &dl, SDValue &Chain, SDValue Glue, const Value V=nullptr) const
	Emit a series of CopyFromReg nodes that copies from this value and returns the result as a ValueVTs value.

void	getCopyToRegs (SDValue Val, SelectionDAG &DAG, const SDLoc &dl, SDValue &Chain, SDValue Glue, const Value V=nullptr, ISD::NodeType PreferredExtendType=ISD::ANY_EXTEND) const
	Emit a series of CopyToReg nodes that copies the specified value into the registers specified by this object.

void	AddInlineAsmOperands (InlineAsm::Kind Code, bool HasMatching, unsigned MatchingIdx, const SDLoc &dl, SelectionDAG &DAG, std::vector< SDValue > &Ops) const
	Add this value to the specified inlineasm node operand list.

bool	occupiesMultipleRegs () const
	Check if the total RegCount is greater than one.

SmallVector< std::pair< unsigned, TypeSize >, 4 >	getRegsAndSizes () const
	Return a list of registers and their sizes.

Public Attributes
SmallVector< EVT, 4 >	ValueVTs
	The value types of the values, which may not be legal, and may need be promoted or synthesized from one or more registers.

SmallVector< MVT, 4 >	RegVTs
	The value types of the registers.

SmallVector< unsigned, 4 >	Regs
	This list holds the registers assigned to the values.

SmallVector< unsigned, 4 >	RegCount
	This list holds the number of registers for each value.

std::optional< CallingConv::ID >	CallConv
	Records if this value needs to be treated in an ABI dependant manner, different to normal type legalization.

Detailed Description

This struct represents the registers (physical or virtual) that a particular set of values is assigned, and the type information about the value.

The most common situation is to represent one value at a time, but struct or array values are handled element-wise as multiple values. The splitting of aggregates is performed recursively, so that we never have aggregate-typed registers. The values at this point do not necessarily have legal types, so each value may require one or more registers of some legal type.

Definition at line 725 of file SelectionDAGBuilder.h.

Constructor & Destructor Documentation

◆ RegsForValue() [1/3]

llvm::RegsForValue::RegsForValue ( )

default

◆ RegsForValue() [2/3]

RegsForValue::RegsForValue	(	const SmallVector< unsigned, 4 > &	regs,
		MVT	regvt,
		EVT	valuevt,
		std::optional< CallingConv::ID >	CC = `std::nullopt`
	)

Definition at line 848 of file SelectionDAGBuilder.cpp.

References llvm::size().

◆ RegsForValue() [3/3]

RegsForValue::RegsForValue	(	LLVMContext &	Context,
		const TargetLowering &	TLI,
		const DataLayout &	DL,
		unsigned	Reg,
		Type *	Ty,
		std::optional< CallingConv::ID >	CC
	)

Definition at line 853 of file SelectionDAGBuilder.cpp.

References CallConv, CC, llvm::ComputeValueVTs(), DL, llvm::TargetLoweringBase::getNumRegisters(), llvm::TargetLoweringBase::getNumRegistersForCallingConv(), llvm::TargetLoweringBase::getRegisterType(), llvm::TargetLoweringBase::getRegisterTypeForCallingConv(), isABIMangled(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), RegCount, Regs, RegVTs, and ValueVTs.

Member Function Documentation

◆ AddInlineAsmOperands()

void RegsForValue::AddInlineAsmOperands	(	InlineAsm::Kind	Code,
		bool	HasMatching,
		unsigned	MatchingIdx,
		const SDLoc &	dl,
		SelectionDAG &	DAG,
		std::vector< SDValue > &	Ops
	)		const

Add this value to the specified inlineasm node operand list.

This adds the code marker, matching input operand index (if applicable), and includes the number of values added into it.

Definition at line 1020 of file SelectionDAGBuilder.cpp.

References assert(), llvm::InlineAsm::Clobber, llvm::SmallVectorBase< Size_T >::empty(), llvm::SmallVectorTemplateCommon< T, typename >::front(), llvm::SelectionDAG::getContext(), llvm::MachineFunction::getFrameInfo(), llvm::TargetRegisterClass::getID(), llvm::SelectionDAG::getMachineFunction(), llvm::TargetLoweringBase::getNumRegisters(), llvm::MachineFunction::getRegInfo(), llvm::SelectionDAG::getRegister(), llvm::TargetLoweringBase::getStackPointerRegisterToSaveRestore(), llvm::SelectionDAG::getTargetConstant(), llvm::SelectionDAG::getTargetLoweringInfo(), llvm::MachineFrameInfo::hasOpaqueSPAdjustment(), I, llvm::Register::isVirtualRegister(), MRI, llvm::SmallVectorTemplateBase< T, bool >::push_back(), Regs, RegVTs, llvm::SmallVectorBase< Size_T >::size(), and ValueVTs.

◆ append()

void llvm::RegsForValue::append ( const RegsForValue & RHS )

inline

Add the specified values to this one.

Definition at line 762 of file SelectionDAGBuilder.h.

References llvm::SmallVectorImpl< T >::append(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), RegCount, Regs, RegVTs, RHS, and ValueVTs.

◆ getCopyFromRegs()

SDValue RegsForValue::getCopyFromRegs	(	SelectionDAG &	DAG,
		FunctionLoweringInfo &	FuncInfo,
		const SDLoc &	dl,
		SDValue &	Chain,
		SDValue *	Glue,
		const Value *	V = `nullptr`
	)		const

Emit a series of CopyFromReg nodes that copies from this value and returns the result as a ValueVTs value.

This uses Chain/Flag as the input and updates them for the output Chain/Flag. If the Flag pointer is NULL, no flag is used.

Definition at line 877 of file SelectionDAGBuilder.cpp.

References assert(), llvm::ISD::AssertSext, llvm::ISD::AssertZext, llvm::SmallVectorTemplateCommon< T, typename >::begin(), CallConv, llvm::SmallVectorImpl< T >::clear(), llvm::KnownBits::countMinLeadingZeros(), llvm::SelectionDAG::getConstant(), llvm::SelectionDAG::getContext(), getCopyFromParts(), llvm::SelectionDAG::getCopyFromReg(), llvm::EVT::getIntegerVT(), llvm::FunctionLoweringInfo::GetLiveOutRegInfo(), llvm::SelectionDAG::getNode(), llvm::TargetLoweringBase::getRegisterTypeForCallingConv(), llvm::MVT::getScalarSizeInBits(), llvm::SelectionDAG::getTargetLoweringInfo(), llvm::SelectionDAG::getValueType(), llvm::SelectionDAG::getVTList(), isABIMangled(), llvm::MVT::isInteger(), llvm::Register::isVirtualRegister(), llvm::FunctionLoweringInfo::LiveOutInfo::Known, llvm::ISD::MERGE_VALUES, llvm::FunctionLoweringInfo::LiveOutInfo::NumSignBits, P, RegCount, Regs, RegSize, RegVTs, llvm::SmallVectorImpl< T >::resize(), and ValueVTs.

Referenced by llvm::SelectionDAGBuilder::getCopyFromRegs(), and llvm::SelectionDAGBuilder::getValueImpl().

◆ getCopyToRegs()

void RegsForValue::getCopyToRegs	(	SDValue	Val,
		SelectionDAG &	DAG,
		const SDLoc &	dl,
		SDValue &	Chain,
		SDValue *	Glue,
		const Value *	V = `nullptr`,
		ISD::NodeType	PreferredExtendType = `ISD::ANY_EXTEND`
	)		const

Emit a series of CopyToReg nodes that copies the specified value into the registers specified by this object.

This uses Chain/Flag as the input and updates them for the output Chain/Flag. If the Flag pointer is nullptr, no flag is used. If V is not nullptr, then it is used in printing better diagnostic messages on error.

Definition at line 964 of file SelectionDAGBuilder.cpp.

References llvm::ISD::ANY_EXTEND, CallConv, llvm::SelectionDAG::getContext(), getCopyToParts(), llvm::SelectionDAG::getCopyToReg(), llvm::SelectionDAG::getNode(), llvm::TargetLoweringBase::getRegisterTypeForCallingConv(), llvm::SDValue::getResNo(), llvm::SelectionDAG::getTargetLoweringInfo(), llvm::SDValue::getValue(), isABIMangled(), llvm::TargetLoweringBase::isZExtFree(), RegCount, Regs, RegVTs, llvm::SmallVectorBase< Size_T >::size(), llvm::ISD::TokenFactor, ValueVTs, and llvm::ISD::ZERO_EXTEND.

Referenced by llvm::SelectionDAGBuilder::CopyValueToVirtualRegister(), llvm::SelectionDAGBuilder::LowerAsSTATEPOINT(), and llvm::SelectionDAGBuilder::LowerStatepoint().

◆ getRegsAndSizes()

SmallVector< std::pair< unsigned, TypeSize >, 4 > RegsForValue::getRegsAndSizes ( ) const

Return a list of registers and their sizes.

Definition at line 1074 of file SelectionDAGBuilder.cpp.

References llvm::MVT::getSizeInBits(), I, llvm::SmallVectorTemplateBase< T, bool >::push_back(), RegCount, Regs, RegVTs, and llvm::zip_first().

Referenced by llvm::SelectionDAGBuilder::handleDebugValue().

◆ isABIMangled()

bool llvm::RegsForValue::isABIMangled ( ) const

inline

Definition at line 759 of file SelectionDAGBuilder.h.

References CallConv.

Referenced by getCopyFromRegs(), getCopyToRegs(), and RegsForValue().

◆ occupiesMultipleRegs()

bool llvm::RegsForValue::occupiesMultipleRegs ( ) const

inline

Check if the total RegCount is greater than one.

Definition at line 794 of file SelectionDAGBuilder.h.

References llvm::SmallVectorTemplateCommon< T, typename >::begin(), llvm::SmallVectorTemplateCommon< T, typename >::end(), and RegCount.

Referenced by llvm::SelectionDAGBuilder::handleDebugValue().

Member Data Documentation

◆ CallConv

std::optional<CallingConv::ID> llvm::RegsForValue::CallConv

Records if this value needs to be treated in an ABI dependant manner, different to normal type legalization.

Definition at line 750 of file SelectionDAGBuilder.h.

Referenced by getCopyFromRegs(), getCopyToRegs(), isABIMangled(), and RegsForValue().

◆ RegCount

SmallVector<unsigned, 4> llvm::RegsForValue::RegCount

This list holds the number of registers for each value.

Definition at line 746 of file SelectionDAGBuilder.h.

Referenced by append(), getCopyFromRegs(), getCopyToRegs(), getRegsAndSizes(), occupiesMultipleRegs(), and RegsForValue().

◆ Regs

SmallVector<unsigned, 4> llvm::RegsForValue::Regs

This list holds the registers assigned to the values.

Each legal or promoted value requires one register, and each expanded value requires multiple registers.

Definition at line 743 of file SelectionDAGBuilder.h.

Referenced by AddInlineAsmOperands(), append(), getCopyFromRegs(), getCopyToRegs(), getRegsAndSizes(), and RegsForValue().

◆ RegVTs

SmallVector<MVT, 4> llvm::RegsForValue::RegVTs

The value types of the registers.

This is the same size as ValueVTs and it records, for each value, what the type of the assigned register or registers are. (Individual values are never synthesized from more than one type of register.)

With virtual registers, the contents of RegVTs is redundant with TLI's getRegisterType member function, however when with physical registers it is necessary to have a separate record of the types.

Definition at line 738 of file SelectionDAGBuilder.h.

Referenced by AddInlineAsmOperands(), append(), getCopyFromRegs(), getCopyToRegs(), getRegsAndSizes(), and RegsForValue().

◆ ValueVTs

SmallVector<EVT, 4> llvm::RegsForValue::ValueVTs

The value types of the values, which may not be legal, and may need be promoted or synthesized from one or more registers.

Definition at line 728 of file SelectionDAGBuilder.h.

Referenced by AddInlineAsmOperands(), append(), getCopyFromRegs(), getCopyToRegs(), and RegsForValue().

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

lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h
lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp

Public Member Functions

Public Attributes

Detailed Description

Constructor & Destructor Documentation

◆ RegsForValue() [1/3]

◆ RegsForValue() [2/3]

◆ RegsForValue() [3/3]

Member Function Documentation

◆ AddInlineAsmOperands()

◆ append()

◆ getCopyFromRegs()

◆ getCopyToRegs()

◆ getRegsAndSizes()

◆ isABIMangled()

◆ occupiesMultipleRegs()

Member Data Documentation

◆ CallConv

◆ RegCount

◆ Regs

◆ RegVTs

◆ ValueVTs