llvm::LegalizerInfo Class Reference

#include "llvm/CodeGen/GlobalISel/LegalizerInfo.h"

Inheritance diagram for llvm::LegalizerInfo:

Public Member Functions
virtual	~LegalizerInfo ()=default
unsigned	getOpcodeIdxForOpcode (unsigned Opcode) const
unsigned	getActionDefinitionsIdx (unsigned Opcode) const
void	verify (const MCInstrInfo &MII) const
	Perform simple self-diagnostic and assert if there is anything obviously wrong with the actions set up.
const LegalizeRuleSet &	getActionDefinitions (unsigned Opcode) const
	Get the action definitions for the given opcode.
LegalizeRuleSet &	getActionDefinitionsBuilder (unsigned Opcode)
	Get the action definition builder for the given opcode.
LegalizeRuleSet &	getActionDefinitionsBuilder (std::initializer_list< unsigned > Opcodes)
	Get the action definition builder for the given set of opcodes.
void	aliasActionDefinitions (unsigned OpcodeTo, unsigned OpcodeFrom)
LegalizeActionStep	getAction (const LegalityQuery &Query) const
	Determine what action should be taken to legalize the described instruction.
LegalizeActionStep	getAction (const MachineInstr &MI, const MachineRegisterInfo &MRI) const
	Determine what action should be taken to legalize the given generic instruction.
bool	isLegal (const LegalityQuery &Query) const
bool	isLegalOrCustom (const LegalityQuery &Query) const
bool	isLegal (const MachineInstr &MI, const MachineRegisterInfo &MRI) const
bool	isLegalOrCustom (const MachineInstr &MI, const MachineRegisterInfo &MRI) const
virtual bool	legalizeCustom (LegalizerHelper &Helper, MachineInstr &MI, LostDebugLocObserver &LocObserver) const
	Called for instructions with the Custom LegalizationAction.
virtual bool	legalizeIntrinsic (LegalizerHelper &Helper, MachineInstr &MI) const
virtual unsigned	getExtOpcodeForWideningConstant (LLT SmallTy) const
	Return the opcode (SEXT/ZEXT/ANYEXT) that should be performed while widening a constant of type SmallTy which targets can override.

Detailed Description

Definition at line 1326 of file LegalizerInfo.h.

Constructor & Destructor Documentation

~LegalizerInfo()

virtual llvm::LegalizerInfo::~LegalizerInfo ( )

virtualdefault

References aliasActionDefinitions(), getAction(), getActionDefinitions(), getActionDefinitionsBuilder(), getActionDefinitionsIdx(), getOpcodeIdxForOpcode(), and MI.

Member Function Documentation

aliasActionDefinitions()

void LegalizerInfo::aliasActionDefinitions	(	unsigned	OpcodeTo,
		unsigned	OpcodeFrom )

Definition at line 329 of file LegalizerInfo.cpp.

References assert(), and getOpcodeIdxForOpcode().

Referenced by getActionDefinitionsBuilder(), and ~LegalizerInfo().

getAction() [1/2]

LegalizeActionStep LegalizerInfo::getAction

(

const LegalityQuery &

Query

)

const

Determine what action should be taken to legalize the described instruction.

Requires computeTables to have been called.

Returns

a description of the next legalization step to perform.

Definition at line 338 of file LegalizerInfo.cpp.

References llvm::LegalizeRuleSet::apply(), getActionDefinitions(), and llvm::LegalityQuery::Opcode.

Referenced by getAction(), isLegal(), isLegal(), isLegalOrCustom(), isLegalOrCustom(), and ~LegalizerInfo().

getAction() [2/2]

LegalizeActionStep LegalizerInfo::getAction	(	const MachineInstr &	MI,
		const MachineRegisterInfo &	MRI ) const

Determine what action should be taken to legalize the given generic instruction.

Returns

a description of the next legalization step to perform.

Definition at line 343 of file LegalizerInfo.cpp.

References getAction(), getTypeFromTypeIdx(), MI, llvm::SmallVectorTemplateBase< T, bool >::push_back(), and llvm::SmallBitVector::set().

getActionDefinitions()

const LegalizeRuleSet & LegalizerInfo::getActionDefinitions

(

unsigned

Opcode

)

const

Get the action definitions for the given opcode.

Use this to run a LegalityQuery through the definitions.

Definition at line 302 of file LegalizerInfo.cpp.

References getActionDefinitionsIdx().

Referenced by getAction(), verify(), and ~LegalizerInfo().

getActionDefinitionsBuilder() [1/2]

LegalizeRuleSet & LegalizerInfo::getActionDefinitionsBuilder

(

std::initializer_list< unsigned >

Opcodes

)

Get the action definition builder for the given set of opcodes.

Use this to define the action definitions for multiple opcodes at once. The first opcode given will be considered the representative opcode and will hold the definitions whereas the other opcodes will be configured to refer to the representative opcode. This lowers memory requirements and very slightly improves performance.

It would be very easy to introduce unexpected side-effects as a result of this aliasing if it were permitted to request different but intersecting sets of opcodes but that is difficult to keep track of. It is therefore an error to request the same opcode twice using this API, to request an opcode that already has definitions, or to use the single-opcode API on an opcode that has already been requested by this API.

Definition at line 314 of file LegalizerInfo.cpp.

References aliasActionDefinitions(), assert(), llvm::drop_begin(), and getActionDefinitionsBuilder().

getActionDefinitionsBuilder() [2/2]

LegalizeRuleSet & LegalizerInfo::getActionDefinitionsBuilder

(

unsigned

Opcode

)

Get the action definition builder for the given opcode.

Use this to define the action definitions.

It is an error to request an opcode that has already been requested by the multiple-opcode variant.

Definition at line 307 of file LegalizerInfo.cpp.

References assert(), and getActionDefinitionsIdx().

Referenced by llvm::AArch64LegalizerInfo::AArch64LegalizerInfo(), llvm::AMDGPULegalizerInfo::AMDGPULegalizerInfo(), llvm::ARMLegalizerInfo::ARMLegalizerInfo(), getActionDefinitionsBuilder(), llvm::M68kLegalizerInfo::M68kLegalizerInfo(), llvm::MipsLegalizerInfo::MipsLegalizerInfo(), llvm::PPCLegalizerInfo::PPCLegalizerInfo(), llvm::RISCVLegalizerInfo::RISCVLegalizerInfo(), llvm::SPIRVLegalizerInfo::SPIRVLegalizerInfo(), llvm::WebAssemblyLegalizerInfo::WebAssemblyLegalizerInfo(), llvm::X86LegalizerInfo::X86LegalizerInfo(), and ~LegalizerInfo().

getActionDefinitionsIdx()

unsigned LegalizerInfo::getActionDefinitionsIdx

(

unsigned

Opcode

)

const

Definition at line 287 of file LegalizerInfo.cpp.

References assert(), llvm::dbgs(), getOpcodeIdxForOpcode(), LLVM_DEBUG, and VerboseVerifyLegalizerInfo.

Referenced by getActionDefinitions(), getActionDefinitionsBuilder(), and ~LegalizerInfo().

getExtOpcodeForWideningConstant()

unsigned LegalizerInfo::getExtOpcodeForWideningConstant ( LLT SmallTy ) const

virtual

Return the opcode (SEXT/ZEXT/ANYEXT) that should be performed while widening a constant of type SmallTy which targets can override.

For eg, the DAG does (SmallTy.isByteSized() ? G_SEXT : G_ZEXT) which will be the default.

Definition at line 385 of file LegalizerInfo.cpp.

References llvm::LLT::isByteSized().

getOpcodeIdxForOpcode()

unsigned LegalizerInfo::getOpcodeIdxForOpcode

(

unsigned

Opcode

)

const

Definition at line 282 of file LegalizerInfo.cpp.

References assert().

Referenced by aliasActionDefinitions(), getActionDefinitionsIdx(), and ~LegalizerInfo().

isLegal() [1/2]

bool llvm::LegalizerInfo::isLegal ( const LegalityQuery & Query ) const

inline

Definition at line 1378 of file LegalizerInfo.h.

References getAction().

isLegal() [2/2]

bool LegalizerInfo::isLegal	(	const MachineInstr &	MI,
		const MachineRegisterInfo &	MRI ) const

Definition at line 372 of file LegalizerInfo.cpp.

References llvm::LegalizeActionStep::Action, getAction(), llvm::IRSimilarity::Legal, and MI.

isLegalOrCustom() [1/2]

bool llvm::LegalizerInfo::isLegalOrCustom ( const LegalityQuery & Query ) const

inline

Definition at line 1382 of file LegalizerInfo.h.

References getAction().

isLegalOrCustom() [2/2]

bool LegalizerInfo::isLegalOrCustom	(	const MachineInstr &	MI,
		const MachineRegisterInfo &	MRI ) const

Definition at line 377 of file LegalizerInfo.cpp.

References llvm::LegalizeActionStep::Action, llvm::Custom, getAction(), llvm::IRSimilarity::Legal, and MI.

legalizeCustom()

virtual bool llvm::LegalizerInfo::legalizeCustom ( LegalizerHelper & Helper, MachineInstr & MI, LostDebugLocObserver & LocObserver ) const

inlinevirtual

Called for instructions with the Custom LegalizationAction.

Reimplemented in llvm::AArch64LegalizerInfo, llvm::AMDGPULegalizerInfo, llvm::ARMLegalizerInfo, llvm::MipsLegalizerInfo, llvm::RISCVLegalizerInfo, llvm::SPIRVLegalizerInfo, llvm::WebAssemblyLegalizerInfo, and llvm::X86LegalizerInfo.

Definition at line 1392 of file LegalizerInfo.h.

References llvm_unreachable, and MI.

legalizeIntrinsic()

virtual bool llvm::LegalizerInfo::legalizeIntrinsic ( LegalizerHelper & Helper, MachineInstr & MI ) const

inlinevirtual

Returns

true if MI is either legal or has been legalized and false if not legal. Return true if MI is either legal or has been legalized and false if not legal.

Reimplemented in llvm::AArch64LegalizerInfo, llvm::AMDGPULegalizerInfo, llvm::MipsLegalizerInfo, llvm::RISCVLegalizerInfo, llvm::SPIRVLegalizerInfo, and llvm::X86LegalizerInfo.

Definition at line 1401 of file LegalizerInfo.h.

References MI.

verify()

void LegalizerInfo::verify

(

const MCInstrInfo &

MII

)

const

Perform simple self-diagnostic and assert if there is anything obviously wrong with the actions set up.

Precondition

Type indices of every opcode form a dense set starting from 0.

Definition at line 390 of file LegalizerInfo.cpp.

References llvm::dbgs(), llvm::errs(), llvm::MCInstrInfo::get(), getActionDefinitions(), llvm::MCInstrInfo::getName(), LLVM_DEBUG, llvm::report_fatal_error(), VerboseVerifyLegalizerInfo, llvm::LegalizeRuleSet::verifyImmIdxsCoverage(), and llvm::LegalizeRuleSet::verifyTypeIdxsCoverage().

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

• include/llvm/CodeGen/GlobalISel/LegalizerInfo.h
• lib/CodeGen/GlobalISel/LegalizerInfo.cpp