llvm::Attribute Class Reference

#include "llvm/IR/Attributes.h"

Public Types
enum	AttrKind { None, EndAttrKinds }
	This enumeration lists the attributes that can be associated with parameters, function results, or the function itself. More...

Public Member Functions
	Attribute ()=default
bool	isEnumAttribute () const
	Return true if the attribute is an Attribute::AttrKind type. More...
bool	isIntAttribute () const
	Return true if the attribute is an integer attribute. More...
bool	isStringAttribute () const
	Return true if the attribute is a string (target-dependent) attribute. More...
bool	isTypeAttribute () const
	Return true if the attribute is a type attribute. More...
bool	hasAttribute (AttrKind Val) const
	Return true if the attribute is present. More...
bool	hasAttribute (StringRef Val) const
	Return true if the target-dependent attribute is present. More...
Attribute::AttrKind	getKindAsEnum () const
	Return the attribute's kind as an enum (Attribute::AttrKind). More...
uint64_t	getValueAsInt () const
	Return the attribute's value as an integer. More...
StringRef	getKindAsString () const
	Return the attribute's kind as a string. More...
StringRef	getValueAsString () const
	Return the attribute's value as a string. More...
Type *	getValueAsType () const
	Return the attribute's value as a Type. More...
unsigned	getAlignment () const
	Returns the alignment field of an attribute as a byte alignment value. More...
unsigned	getStackAlignment () const
	Returns the stack alignment field of an attribute as a byte alignment value. More...
uint64_t	getDereferenceableBytes () const
	Returns the number of dereferenceable bytes from the dereferenceable attribute. More...
uint64_t	getDereferenceableOrNullBytes () const
	Returns the number of dereferenceable_or_null bytes from the dereferenceable_or_null attribute. More...
std::pair< unsigned, Optional< unsigned > >	getAllocSizeArgs () const
	Returns the argument numbers for the allocsize attribute (or pair(0, 0) if not known). More...
std::string	getAsString (bool InAttrGrp=false) const
	The Attribute is converted to a string of equivalent mnemonic. More...
bool	operator== (Attribute A) const
	Equality and non-equality operators. More...
bool	operator!= (Attribute A) const
bool	operator< (Attribute A) const
	Less-than operator. Useful for sorting the attributes list. More...
void	Profile (FoldingSetNodeID &ID) const
void *	getRawPointer () const
	Return a raw pointer that uniquely identifies this attribute. More...

Static Public Member Functions
static Attribute	get (LLVMContext &Context, AttrKind Kind, uint64_t Val=0)
	Return a uniquified Attribute object. More...
static Attribute	get (LLVMContext &Context, StringRef Kind, StringRef Val=StringRef())
static Attribute	get (LLVMContext &Context, AttrKind Kind, Type *Ty)
static Attribute	getWithAlignment (LLVMContext &Context, uint64_t Align)
	Return a uniquified Attribute object that has the specific alignment set. More...
static Attribute	getWithStackAlignment (LLVMContext &Context, uint64_t Align)
static Attribute	getWithDereferenceableBytes (LLVMContext &Context, uint64_t Bytes)
static Attribute	getWithDereferenceableOrNullBytes (LLVMContext &Context, uint64_t Bytes)
static Attribute	getWithAllocSizeArgs (LLVMContext &Context, unsigned ElemSizeArg, const Optional< unsigned > &NumElemsArg)
static Attribute	getWithByValType (LLVMContext &Context, Type *Ty)
static Attribute	fromRawPointer (void *RawPtr)
	Get an attribute from a raw pointer created by getRawPointer. More...

Detailed Description

Definition at line 50 of file Attributes.h.

Member Enumeration Documentation

AttrKind

enum llvm::Attribute::AttrKind

This enumeration lists the attributes that can be associated with parameters, function results, or the function itself.

Note: The `uwtable' attribute is about the ABI or the user mandating an entry in the unwind table. The `nounwind' attribute is about an exception passing by the function.

In a theoretical system that uses tables for profiling and SjLj for exceptions, they would be fully independent. In a normal system that uses tables for both, the semantics are:

nil = Needs an entry because an exception might pass by. nounwind = No need for an entry uwtable = Needs an entry because the ABI says so and because an exception might pass by. uwtable + nounwind = Needs an entry because the ABI says so.

Enumerator
None	No attributes have been set.
EndAttrKinds	Sentinal value useful for loops.

Definition at line 69 of file Attributes.h.

Constructor & Destructor Documentation

Attribute()

llvm::Attribute::Attribute ( )

default

Referenced by fromRawPointer(), get(), and llvm::AttributeSet::getAttribute().

Member Function Documentation

fromRawPointer()

static Attribute llvm::Attribute::fromRawPointer ( void *  RawPtr )

inlinestatic

Get an attribute from a raw pointer created by getRawPointer.

Definition at line 192 of file Attributes.h.

References Attribute().

Referenced by llvm::unwrap().

get() [1/3]

Attribute Attribute::get ( LLVMContext &  Context, Attribute::AttrKind  Kind, uint64_t  Val = 0  )

static

Return a uniquified Attribute object.

Definition at line 80 of file Attributes.cpp.

References llvm::FoldingSetNodeID::AddInteger(), Attribute(), llvm::LLVMContextImpl::AttrsSet, and llvm::LLVMContext::pImpl.

Referenced by llvm::Function::addFnAttr(), findInitTrampoline(), llvm::AttributeSetNode::get(), llvm::AttributeList::get(), llvm::AbstractAttribute::getDeducedAttributes(), LLVMAddTargetDependentFunctionAttr(), LLVMCreateEnumAttribute(), LLVMCreateStringAttribute(), processCallSite(), RemoveNonValidAttrAtIndex(), llvm::WholeProgramDevirtPass::run(), and setInlineRemark().

get() [2/3]

Attribute Attribute::get ( LLVMContext &  Context, StringRef  Kind, StringRef  Val = StringRef()  )

static

Definition at line 104 of file Attributes.cpp.

References llvm::FoldingSetNodeID::AddString(), Attribute(), llvm::LLVMContextImpl::AttrsSet, llvm::StringRef::empty(), and llvm::LLVMContext::pImpl.

get() [3/3]

Attribute Attribute::get ( LLVMContext &  Context, Attribute::AttrKind  Kind, Type *  Ty  )

static

Definition at line 124 of file Attributes.cpp.

References llvm::FoldingSetNodeID::AddInteger(), llvm::FoldingSetNodeID::AddPointer(), Attribute(), llvm::LLVMContextImpl::AttrsSet, and llvm::LLVMContext::pImpl.

getAlignment()

unsigned Attribute::getAlignment

(

)

const

Returns the alignment field of an attribute as a byte alignment value.

Definition at line 247 of file Attributes.cpp.

References assert(), llvm::AttributeImpl::getValueAsInt(), and hasAttribute().

Referenced by llvm::AttrBuilder::addAttribute(), and llvm::AttributeSet::hasAttributes().

getAllocSizeArgs()

std::pair< unsigned, Optional< unsigned > > Attribute::getAllocSizeArgs

(

)

const

Returns the argument numbers for the allocsize attribute (or pair(0, 0) if not known).

Definition at line 273 of file Attributes.cpp.

References assert(), llvm::AttributeImpl::getValueAsInt(), hasAttribute(), and unpackAllocSizeArgs().

Referenced by getAllocationSize(), getAsString(), llvm::AttrBuilder::getByValType(), llvm::AttributeList::getParamDereferenceableOrNullBytes(), and llvm::AttributeSet::hasAttributes().

getAsString()

std::string Attribute::getAsString

(

bool

InAttrGrp = false

)

const

The Attribute is converted to a string of equivalent mnemonic.

This is, presumably, for writing out the mnemonics for the assembly writer.

Definition at line 279 of file Attributes.cpp.

References llvm::CallingConv::Cold, llvm::MCID::Convergent, llvm::raw_ostream::flush(), getAllocSizeArgs(), getKindAsString(), getValueAsInt(), llvm::AttributeImpl::getValueAsString(), getValueAsType(), hasAttribute(), llvm::Optional< T >::hasValue(), isStringAttribute(), llvm::ISD::JumpTable, llvm_unreachable, Name, llvm::NoAlias, llvm::printEscapedString(), and llvm::utostr().

Referenced by llvm::AttributeSet::dump(), llvm::AttributeList::getParamDereferenceableOrNullBytes(), and llvm::AttributeSet::hasAttributes().

getDereferenceableBytes()

uint64_t Attribute::getDereferenceableBytes

(

)

const

Returns the number of dereferenceable bytes from the dereferenceable attribute.

Definition at line 259 of file Attributes.cpp.

References assert(), llvm::AttributeImpl::getValueAsInt(), and hasAttribute().

Referenced by llvm::AttrBuilder::addAttribute(), llvm::AttributeList::getParamAttr(), llvm::AttributeList::getParamDereferenceableBytes(), and llvm::AttributeSet::hasAttributes().

getDereferenceableOrNullBytes()

uint64_t Attribute::getDereferenceableOrNullBytes

(

)

const

Returns the number of dereferenceable_or_null bytes from the dereferenceable_or_null attribute.

Definition at line 266 of file Attributes.cpp.

References assert(), llvm::AttributeImpl::getValueAsInt(), and hasAttribute().

Referenced by llvm::AttrBuilder::addAttribute(), llvm::AttributeList::getParamDereferenceableBytes(), llvm::AttributeList::getParamDereferenceableOrNullBytes(), and llvm::AttributeSet::hasAttributes().

getKindAsEnum()

Attribute::AttrKind Attribute::getKindAsEnum

(

)

const

Return the attribute's kind as an enum (Attribute::AttrKind).

This requires the attribute to be an enum or integer attribute.

Definition at line 202 of file Attributes.cpp.

References assert(), llvm::AttributeImpl::getKindAsEnum(), isEnumAttribute(), isIntAttribute(), isTypeAttribute(), and None.

Referenced by llvm::AttrBuilder::addAttribute(), addIfNotExistent(), bookkeeping(), llvm::FunctionComparator::cmpMem(), llvm::AttributeImpl::hasAttribute(), LLVMGetEnumAttributeKind(), and llvm::AttributeImpl::operator<().

getKindAsString()

StringRef Attribute::getKindAsString

(

)

const

Return the attribute's kind as a string.

This requires the attribute to be a string attribute.

Definition at line 216 of file Attributes.cpp.

References assert(), llvm::AttributeImpl::getKindAsString(), and isStringAttribute().

Referenced by llvm::AttrBuilder::addAttribute(), addIfNotExistent(), getAsString(), llvm::AttributeImpl::hasAttribute(), LLVMGetStringAttributeKind(), and llvm::AttributeImpl::operator<().

getRawPointer()

void* llvm::Attribute::getRawPointer ( ) const

inline

Return a raw pointer that uniquely identifies this attribute.

Definition at line 187 of file Attributes.h.

Referenced by llvm::wrap().

getStackAlignment()

unsigned Attribute::getStackAlignment

(

)

const

Returns the stack alignment field of an attribute as a byte alignment value.

Definition at line 253 of file Attributes.cpp.

References assert(), llvm::AttributeImpl::getValueAsInt(), and hasAttribute().

Referenced by llvm::AttrBuilder::addAttribute(), llvm::AttributeList::getParamAttr(), and llvm::AttributeSet::hasAttributes().

getValueAsInt()

uint64_t Attribute::getValueAsInt

(

)

const

Return the attribute's value as an integer.

This requires that the attribute be an integer attribute.

Definition at line 209 of file Attributes.cpp.

References assert(), llvm::AttributeImpl::getValueAsInt(), and isIntAttribute().

Referenced by llvm::AttrBuilder::addAttribute(), getAsString(), isEqualOrWorse(), and llvm::AttributeImpl::operator<().

getValueAsString()

StringRef Attribute::getValueAsString

(

)

const

Return the attribute's value as a string.

This requires the attribute to be a string attribute.

Definition at line 223 of file Attributes.cpp.

References assert(), llvm::AttributeImpl::getValueAsString(), and isStringAttribute().

Referenced by llvm::AttrBuilder::addAttribute(), adjustCallerStackProbeSize(), adjustMinLegalVectorWidth(), llvm::NVPTXTargetLowering::allowUnsafeFPMath(), llvm::AMDGPUMachineFunction::AMDGPUMachineFunction(), llvm::TargetLoweringBase::areJTsAllowed(), checkFunctionsAttributeConsistency(), llvm::TargetOptions::DisableFramePointerElim(), doesNotGeneratecode(), eliminateTailRecursion(), llvm::AMDGPU::HSAMD::MetadataStreamerV2::emitKernel(), llvm::MipsSEFrameLowering::emitPrologue(), llvm::X86FrameLowering::emitPrologue(), FixedPointIntrinsicToOpcode(), foldFPToIntToFP(), llvm::ARMBaseRegisterInfo::getCalleeSavedRegs(), llvm::sampleprof::FunctionSamples::getCanonicalFnName(), getDeoptLowering(), llvm::TargetLoweringObjectFileELF::getExplicitSectionGlobal(), llvm::AMDGPUTargetMachine::getFeatureString(), llvm::AMDGPUTargetMachine::getGPUName(), llvm::AMDGPU::getIntegerAttribute(), llvm::AMDGPU::getIntegerPairAttribute(), getRecipEstimateForFunc(), llvm::X86TargetLowering::getStackProbeSymbolName(), getSubOpcode(), llvm::HexagonTargetMachine::getSubtargetImpl(), llvm::SparcTargetMachine::getSubtargetImpl(), llvm::AArch64TargetMachine::getSubtargetImpl(), llvm::WebAssemblyTargetMachine::getSubtargetImpl(), llvm::X86TargetMachine::getSubtargetImpl(), llvm::PPCTargetMachine::getSubtargetImpl(), llvm::ARMBaseTargetMachine::getSubtargetImpl(), llvm::MipsTargetMachine::getSubtargetImpl(), hasUnsafeFPMath(), llvm::RecurrenceDescriptor::isReductionPHI(), isThumbFunction(), llvm::LoopVectorizationLegality::isUniform(), llvm::AMDGPULibCalls::isUnsafeMath(), LLVMGetStringAttributeValue(), LowerInterruptReturn(), llvm::AttributeImpl::operator<(), llvm::parseStatepointDirectivesFromAttrs(), llvm::TargetMachine::resetTargetOptions(), RetagMask(), llvm::WholeProgramDevirtPass::run(), runOnFunction(), llvm::StackProtector::runOnFunction(), ShouldSignReturnAddress(), ShouldSignWithAKey(), llvm::SIMachineFunctionInfo::SIMachineFunctionInfo(), llvm::AMDGPU::SIModeRegisterDefaults::SIModeRegisterDefaults(), SimplifyNVVMIntrinsic(), unpackF64OnRV32DSoftABI(), llvm::NVPTXTargetLowering::useF32FTZ(), WindowsRequiresStackProbe(), and windowsRequiresStackProbe().

getValueAsType()

Type * Attribute::getValueAsType

(

)

const

Return the attribute's value as a Type.

This requires the attribute to be a type attribute.

Definition at line 230 of file Attributes.cpp.

References assert(), llvm::AttributeImpl::getValueAsType(), and isTypeAttribute().

Referenced by llvm::AttrBuilder::addAttribute(), llvm::FunctionComparator::cmpMem(), forceRenaming(), getAsString(), llvm::CallLowering::setArgFlags(), and wrapConstantAsMetadata().

getWithAlignment()

Attribute Attribute::getWithAlignment ( LLVMContext &  Context, uint64_t  Align  )

static

Return a uniquified Attribute object that has the specific alignment set.

Definition at line 145 of file Attributes.cpp.

References llvm::AMDGPU::HSAMD::Kernel::Arg::Key::Align, assert(), Context, and llvm::isPowerOf2_32().

Referenced by llvm::IRBuilderBase::CreateElementUnorderedAtomicMemMove(), llvm::AttributeSetNode::get(), LLVMSetInstrParamAlignment(), LLVMSetParamAlignment(), llvm::MemIntrinsicBase< AnyMemIntrinsic >::setDestAlignment(), and llvm::MemTransferBase< AnyMemIntrinsic >::setSourceAlignment().

getWithAllocSizeArgs()

Attribute Attribute::getWithAllocSizeArgs ( LLVMContext &  Context, unsigned  ElemSizeArg, const Optional< unsigned > &  NumElemsArg  )

static

Definition at line 175 of file Attributes.cpp.

References assert(), Context, and packAllocSizeArgs().

Referenced by llvm::AttributeSetNode::get().

getWithByValType()

Attribute Attribute::getWithByValType ( LLVMContext &  Context, Type *  Ty  )

static

Definition at line 170 of file Attributes.cpp.

References Context.

Referenced by findInitTrampoline(), forceRenaming(), llvm::AttributeSetNode::get(), and wrapConstantAsMetadata().

getWithDereferenceableBytes()

Attribute Attribute::getWithDereferenceableBytes ( LLVMContext &  Context, uint64_t  Bytes  )

static

Definition at line 158 of file Attributes.cpp.

References assert(), and Context.

Referenced by llvm::AttributeSetNode::get().

getWithDereferenceableOrNullBytes()

Attribute Attribute::getWithDereferenceableOrNullBytes ( LLVMContext &  Context, uint64_t  Bytes  )

static

Definition at line 164 of file Attributes.cpp.

References assert(), and Context.

Referenced by llvm::AttributeSetNode::get().

getWithStackAlignment()

Attribute Attribute::getWithStackAlignment ( LLVMContext &  Context, uint64_t  Align  )

static

Definition at line 151 of file Attributes.cpp.

References llvm::AMDGPU::HSAMD::Kernel::Arg::Key::Align, assert(), Context, and llvm::isPowerOf2_32().

Referenced by llvm::AttributeSetNode::get().

hasAttribute() [1/2]

bool Attribute::hasAttribute

(

AttrKind

Val

)

const

Return true if the attribute is present.

Definition at line 238 of file Attributes.cpp.

References llvm::AttributeImpl::hasAttribute(), and None.

Referenced by llvm::AttributeList::addAllocSizeParamAttr(), llvm::AttributeSet::addAttribute(), getAlignment(), getAllocSizeArgs(), getAsString(), llvm::AttributeSetNode::getAttribute(), getDereferenceableBytes(), getDereferenceableOrNullBytes(), llvm::AMDGPUTargetMachine::getFeatureString(), llvm::AMDGPUTargetMachine::getGPUName(), getStackAlignment(), llvm::HexagonTargetMachine::getSubtargetImpl(), llvm::SparcTargetMachine::getSubtargetImpl(), llvm::AArch64TargetMachine::getSubtargetImpl(), llvm::WebAssemblyTargetMachine::getSubtargetImpl(), llvm::X86TargetMachine::getSubtargetImpl(), llvm::PPCTargetMachine::getSubtargetImpl(), llvm::ARMBaseTargetMachine::getSubtargetImpl(), llvm::MipsTargetMachine::getSubtargetImpl(), llvm::AttributeSet::hasAttributes(), llvm::AttributeList::hasParamAttr(), llvm::isStatepointDirectiveAttr(), isThumbFunction(), llvm::AttributeSet::removeAttribute(), and llvm::WholeProgramDevirtPass::run().

hasAttribute() [2/2]

bool Attribute::hasAttribute

(

StringRef

Val

)

const

Return true if the target-dependent attribute is present.

Definition at line 242 of file Attributes.cpp.

References llvm::AttributeImpl::hasAttribute(), and isStringAttribute().

isEnumAttribute()

bool Attribute::isEnumAttribute

(

)

const

Return true if the attribute is an Attribute::AttrKind type.

Definition at line 186 of file Attributes.cpp.

References llvm::AttributeImpl::isEnumAttribute().

Referenced by addIfNotExistent(), bookkeeping(), llvm::AttributeImpl::getKindAsEnum(), getKindAsEnum(), and llvm::AttributeImpl::operator<().

isIntAttribute()

bool Attribute::isIntAttribute

(

)

const

Return true if the attribute is an integer attribute.

Definition at line 190 of file Attributes.cpp.

References llvm::AttributeImpl::isIntAttribute().

Referenced by llvm::AttributeImpl::getKindAsEnum(), getKindAsEnum(), llvm::AttributeImpl::getValueAsInt(), getValueAsInt(), isEqualOrWorse(), and llvm::AttributeImpl::operator<().

isStringAttribute()

bool Attribute::isStringAttribute

(

)

const

Return true if the attribute is a string (target-dependent) attribute.

Definition at line 194 of file Attributes.cpp.

References llvm::AttributeImpl::isStringAttribute().

Referenced by llvm::AttrBuilder::addAttribute(), addIfNotExistent(), llvm::AMDGPUMachineFunction::AMDGPUMachineFunction(), getAsString(), llvm::AMDGPU::getIntegerAttribute(), llvm::AMDGPU::getIntegerPairAttribute(), llvm::AttributeImpl::getKindAsString(), getKindAsString(), llvm::AttributeImpl::getValueAsString(), getValueAsString(), llvm::AttributeImpl::hasAttribute(), hasAttribute(), LLVMIsStringAttribute(), llvm::AttributeImpl::operator<(), llvm::parseStatepointDirectivesFromAttrs(), and llvm::StackProtector::runOnFunction().

isTypeAttribute()

bool Attribute::isTypeAttribute

(

)

const

Return true if the attribute is a type attribute.

Definition at line 198 of file Attributes.cpp.

References llvm::AttributeImpl::isTypeAttribute().

Referenced by llvm::FunctionComparator::cmpMem(), llvm::AttributeImpl::getKindAsEnum(), getKindAsEnum(), llvm::AttributeImpl::getValueAsType(), getValueAsType(), and llvm::AttributeImpl::operator<().

operator!=()

bool llvm::Attribute::operator!= ( Attribute  A ) const

inline

Definition at line 177 of file Attributes.h.

References operator<().

operator<()

bool Attribute::operator<

(

Attribute

A

)

const

Less-than operator. Useful for sorting the attributes list.

Definition at line 490 of file Attributes.cpp.

References llvm::AttributeImpl::~AttributeImpl().

Referenced by operator!=().

operator==()

bool llvm::Attribute::operator== ( Attribute  A ) const

inline

Equality and non-equality operators.

Definition at line 176 of file Attributes.h.

Referenced by llvm::AttrBuilder::td_empty().

Profile()

void llvm::Attribute::Profile ( FoldingSetNodeID &  ID ) const

inline

Definition at line 182 of file Attributes.h.

References llvm::FoldingSetNodeID::AddPointer().

---

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

• include/llvm/IR/Attributes.h
• lib/IR/Attributes.cpp