llvm::SubtargetFeatures Class Reference

#include <SubtargetFeature.h>

Public Member Functions
	SubtargetFeatures (const StringRef Initial="")
std::string	getString () const
	Features string accessors. More...
void	AddFeature (const StringRef String, bool IsEnabled=true)
	Adding Features. More...
uint64_t	ToggleFeature (uint64_t Bits, const StringRef String, const SubtargetFeatureKV *FeatureTable, size_t FeatureTableSize)
uint64_t	getFeatureBits (const StringRef CPU, const SubtargetFeatureKV *CPUTable, size_t CPUTableSize, const SubtargetFeatureKV *FeatureTable, size_t FeatureTableSize)
	Get feature bits of a CPU. More...
void	print (raw_ostream &OS) const
	Print feature string. More...
void	dump () const
void	getDefaultSubtargetFeatures (const Triple &Triple)
	Adds the default features for the specified target triple. More...

Detailed Description

SubtargetFeatures - 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 72 of file SubtargetFeature.h.

Constructor & Destructor Documentation

SubtargetFeatures::SubtargetFeatures ( const StringRef  Initial = "" )

explicit

Definition at line 175 of file SubtargetFeature.cpp.

References Split().

Member Function Documentation

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

Adding Features.

Adding features.

Definition at line 112 of file SubtargetFeature.cpp.

References llvm::StringRef::empty(), llvm::StringRef::lower(), and PrependFlag().

Referenced by getDefaultSubtargetFeatures(), and llvm::EngineBuilder::selectTarget().

void SubtargetFeatures::dump

(

)

const

dump - Dump feature info.

Definition at line 348 of file SubtargetFeature.cpp.

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

void SubtargetFeatures::getDefaultSubtargetFeatures

(

const Triple &

Triple

)

Adds the default features for the specified target triple.

Adds the default features for the specified target triple.

FIXME: This is an inelegant way of specifying the features of a subtarget. It would be better if we could encode this information into the IR. See <rdar://5972456>.

Definition at line 359 of file SubtargetFeature.cpp.

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

uint64_t SubtargetFeatures::getFeatureBits	(	const StringRef	CPU,
		const SubtargetFeatureKV *	CPUTable,
		size_t	CPUTableSize,
		const SubtargetFeatureKV *	FeatureTable,
		size_t	FeatureTableSize
	)

Get feature bits of a CPU.

getFeatureBits - Get feature bits a CPU.

Definition at line 257 of file SubtargetFeature.cpp.

References llvm::tgtok::Bits, ClearImpliedBits(), llvm::StringRef::empty(), llvm::errs(), Find(), Help(), isEnabled(), SetImpliedBits(), llvm::LibFunc::strcmp, StripFlag(), and llvm::SubtargetFeatureKV::Value.

Referenced by llvm::MCSubtargetInfo::InitMCProcessorInfo().

std::string SubtargetFeatures::getString

(

)

const

Features string accessors.

Definition at line 181 of file SubtargetFeature.cpp.

References Join().

Referenced by llvm::EngineBuilder::selectTarget().

void SubtargetFeatures::print

(

raw_ostream &

OS

)

const

Print feature string.

print - Print feature string.

Definition at line 339 of file SubtargetFeature.cpp.

Referenced by dump().

uint64_t SubtargetFeatures::ToggleFeature	(	uint64_t	Bits,
		const StringRef	Feature,
		const SubtargetFeatureKV *	FeatureTable,
		size_t	FeatureTableSize
	)

ToggleFeature - Toggle a feature and returns the newly updated feature bits.

Definition at line 226 of file SubtargetFeature.cpp.

References llvm::tgtok::Bits, ClearImpliedBits(), llvm::errs(), Find(), SetImpliedBits(), StripFlag(), and llvm::SubtargetFeatureKV::Value.

Referenced by llvm::MCSubtargetInfo::ToggleFeature().

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

• SubtargetFeature.h
• SubtargetFeature.cpp