llvm::SubtargetFeatures Class Reference

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

#include "llvm/TargetParser/SubtargetFeature.h"

Public Member Functions
LLVM_ABI	SubtargetFeatures (StringRef Initial="")
LLVM_ABI std::string	getString () const
	Returns features as a string.
LLVM_ABI void	AddFeature (StringRef String, bool Enable=true)
	Adds Features.
LLVM_ABI void	addFeaturesVector (const ArrayRef< std::string > OtherFeatures)
const std::vector< std::string > &	getFeatures () const
	Returns the vector of individual subtarget features.
LLVM_ABI void	print (raw_ostream &OS) const
	Prints feature string.
LLVM_ABI void	dump () const
LLVM_ABI void	getDefaultSubtargetFeatures (const Triple &Triple)
	Adds the default features for the specified target triple.

Static Public Member Functions
static bool	hasFlag (StringRef Feature)
	Determine if a feature has a flag; '+' or '-'.
static StringRef	StripFlag (StringRef Feature)
	Return string stripped of flag.
static bool	isEnabled (StringRef Feature)
	Return true if enable flag; '+'.
static LLVM_ABI void	Split (std::vector< std::string > &V, StringRef S)
	Splits a string of comma separated items in to a vector of strings.

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 175 of file SubtargetFeature.h.

Constructor & Destructor Documentation

SubtargetFeatures()

SubtargetFeatures::SubtargetFeatures ( StringRef Initial = "" )

explicit

Definition at line 49 of file SubtargetFeature.cpp.

References Split().

Member Function Documentation

AddFeature()

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

Adds Features.

Definition at line 36 of file SubtargetFeature.cpp.

References llvm::Enable, hasFlag(), and llvm::String.

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

addFeaturesVector()

void SubtargetFeatures::addFeaturesVector

(

const ArrayRef< std::string >

OtherFeatures

)

Definition at line 44 of file SubtargetFeature.cpp.

References llvm::append_range().

dump()

LLVM_DUMP_METHOD void SubtargetFeatures::dump

(

)

const

Definition at line 65 of file SubtargetFeature.cpp.

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

getDefaultSubtargetFeatures()

void SubtargetFeatures::getDefaultSubtargetFeatures

(

const Triple &

Triple

)

Adds the default features for the specified target triple.

Definition at line 70 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::ThinLTOCodeGeneratorImpl::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 190 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 54 of file SubtargetFeature.cpp.

References llvm::join().

Referenced by llvm::ThinLTOCodeGeneratorImpl::TargetMachineBuilder::create(), createTargetMachine(), llvm::codegen::getFeaturesStr(), llvm::HexagonSubtarget::initializeSubtargetDependencies(), LLVMGetHostCPUFeatures(), and llvm::EngineBuilder::selectTarget().

hasFlag()

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

inlinestatic

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

Definition at line 202 of file SubtargetFeature.h.

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

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

isEnabled()

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

inlinestatic

Return true if enable flag; '+'.

Definition at line 216 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 58 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 28 of file SubtargetFeature.cpp.

References llvm::SmallVectorTemplateCommon< T, typename >::size(), llvm::StringRef::split(), and T.

Referenced by SubtargetFeatures().

StripFlag()

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

inlinestatic

Return string stripped of flag.

Definition at line 211 of file SubtargetFeature.h.

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

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

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

• include/llvm/TargetParser/SubtargetFeature.h
• lib/TargetParser/SubtargetFeature.cpp