LLVM: llvm::SubtargetFeatures Class Reference

LLVM 15.0.0git

Manages the enabling and disabling of subtarget specific features. More...

#include "llvm/MC/SubtargetFeature.h"

Public Member Functions
	SubtargetFeatures (StringRef Initial="")

std::string	getString () const
	Returns features as a string. More...

void	AddFeature (StringRef String, bool Enable=true)
	Adds Features. More...

const std::vector< std::string > &	getFeatures () const
	Returns the vector of individual subtarget features. More...

void	print (raw_ostream &OS) const
	Prints feature string. More...

void	dump () const

void	getDefaultSubtargetFeatures (const Triple &Triple)
	Adds the default features for the specified target triple. More...

Static Public Member Functions
static bool	hasFlag (StringRef Feature)
	Determine if a feature has a flag; '+' or '-'. More...

static StringRef	StripFlag (StringRef Feature)
	Return string stripped of flag. More...

static bool	isEnabled (StringRef Feature)
	Return true if enable flag; '+'. More...

static void	Split (std::vector< std::string > &V, StringRef S)
	Splits a string of comma separated items in to a vector of strings. More...

Detailed Description

Manages the enabling and disabling of subtarget specific features.

Features are encoded as a string of the form "+attr1,+attr2,-attr3,...,+attrN" A comma separates each feature from the next (all lowercase.) Each of the remaining features is prefixed with + or - indicating whether that feature should be enabled or disabled contrary to the cpu specification.

Definition at line 183 of file SubtargetFeature.h.

Constructor & Destructor Documentation

◆ SubtargetFeatures()

SubtargetFeatures::SubtargetFeatures ( StringRef Initial = "" )

explicit

Definition at line 45 of file SubtargetFeature.cpp.

References Split().

Member Function Documentation

◆ AddFeature()

void SubtargetFeatures::AddFeature	(	StringRef	String,
		bool	Enable = `true`
	)

Adds Features.

Definition at line 37 of file SubtargetFeature.cpp.

References Enable, and hasFlag().

Referenced by llvm::orc::JITTargetMachineBuilder::addFeatures(), createTargetMachine(), llvm::orc::JITTargetMachineBuilder::detectHost(), getDefaultSubtargetFeatures(), llvm::codegen::getFeatureList(), llvm::codegen::getFeaturesStr(), llvm::HexagonSubtarget::initializeSubtargetDependencies(), LLVMGetHostCPUFeatures(), and llvm::EngineBuilder::selectTarget().

◆ dump()

LLVM_DUMP_METHOD void SubtargetFeatures::dump ( ) const

Definition at line 61 of file SubtargetFeature.cpp.

References llvm::dbgs(), and print().

◆ getDefaultSubtargetFeatures()

void SubtargetFeatures::getDefaultSubtargetFeatures ( const Triple & Triple )

Adds the default features for the specified target triple.

Definition at line 66 of file SubtargetFeature.cpp.

References AddFeature(), llvm::Triple::Apple, llvm::Triple::getArch(), llvm::Triple::getVendor(), llvm::Triple::ppc, and llvm::Triple::ppc64.

Referenced by llvm::TargetMachineBuilder::create(), and createTargetMachine().

◆ getFeatures()

const std::vector<std::string>& llvm::SubtargetFeatures::getFeatures ( ) const

inline

Returns the vector of individual subtarget features.

Definition at line 196 of file SubtargetFeature.h.

Referenced by llvm::codegen::getFeatureList(), getFeatures(), llvm::HexagonSubtarget::initializeSubtargetDependencies(), and llvm::AMDGPU::IsaInfo::AMDGPUTargetID::setTargetIDFromFeaturesString().

◆ getString()

std::string SubtargetFeatures::getString ( ) const

Returns features as a string.

Definition at line 50 of file SubtargetFeature.cpp.

Referenced by llvm::TargetMachineBuilder::create(), llvm::orc::JITTargetMachineBuilder::createTargetMachine(), createTargetMachine(), llvm::codegen::getFeaturesStr(), llvm::HexagonSubtarget::initializeSubtargetDependencies(), LLVMGetHostCPUFeatures(), llvm::orc::JITTargetMachineBuilderPrinter::print(), and llvm::EngineBuilder::selectTarget().

◆ hasFlag()

static bool llvm::SubtargetFeatures::hasFlag ( StringRef Feature )

inlinestatic

Determine if a feature has a flag; '+' or '-'.

Definition at line 208 of file SubtargetFeature.h.

References assert(), and llvm::StringRef::empty().

Referenced by AddFeature(), ApplyFeatureFlag(), and StripFlag().

◆ isEnabled()

static bool llvm::SubtargetFeatures::isEnabled ( StringRef Feature )

inlinestatic

Return true if enable flag; '+'.

Definition at line 222 of file SubtargetFeature.h.

References assert(), and llvm::StringRef::empty().

Referenced by ApplyFeatureFlag().

◆ print()

void SubtargetFeatures::print ( raw_ostream & OS ) const

Prints feature string.

Definition at line 54 of file SubtargetFeature.cpp.

References F.

Referenced by dump().

◆ Split()

void SubtargetFeatures::Split	(	std::vector< std::string > &	V,
		StringRef	S
	)

static

Splits a string of comma separated items in to a vector of strings.

Definition at line 29 of file SubtargetFeature.cpp.

References S.

Referenced by SubtargetFeatures().

◆ StripFlag()

static StringRef llvm::SubtargetFeatures::StripFlag ( StringRef Feature )

inlinestatic

Return string stripped of flag.

Definition at line 217 of file SubtargetFeature.h.

References hasFlag(), and llvm::StringRef::substr().

Referenced by ApplyFeatureFlag(), and llvm::MCSubtargetInfo::ToggleFeature().

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

include/llvm/MC/SubtargetFeature.h
lib/MC/SubtargetFeature.cpp