#include <code-stubs.h>

Inheritance diagram for v8::internal::CompareNilICStub:

Collaboration diagram for v8::internal::CompareNilICStub:

Classes
class	NilValueBits

class	State

class	TypesBits

Public Member Functions
Type *	GetType (Zone *zone, Handle< Map > map=Handle< Map >())

Type *	GetInputType (Zone *zone, Handle< Map > map)

	CompareNilICStub (Isolate *isolate, NilValue nil)

	CompareNilICStub (Isolate *isolate, ExtraICState ic_state, InitializationState init_state=INITIALIZED)

virtual InlineCacheState	GetICState () const

virtual Code::Kind	GetCodeKind () const

virtual ExtraICState	GetExtraICState () const

void	UpdateStatus (Handle< Object > object)

bool	IsMonomorphic () const

NilValue	nil_value () const

void	ClearState ()

virtual void	PrintState (OStream &os) const OVERRIDE

virtual void	PrintBaseName (OStream &os) const OVERRIDE

Public Member Functions inherited from v8::internal::HydrogenCodeStub
virtual Handle< Code >	GenerateCode ()=0

bool	IsUninitialized () const

Handle< Code >	GenerateLightweightMissCode (ExternalReference miss)

template<class StateType >
void	TraceTransition (StateType from, StateType to)

Static Public Member Functions
static Handle< Code >	GetUninitialized (Isolate *isolate, NilValue nil)

Static Public Member Functions inherited from v8::internal::HydrogenCodeStub
template<class SubClass >
static Handle< Code >	GetUninitialized (Isolate *isolate)

Private Types
enum	CompareNilType { UNDEFINED , NULL_TYPE , MONOMORPHIC_MAP , GENERIC , NUMBER_OF_TYPES }

Private Member Functions
	CompareNilICStub (Isolate *isolate, NilValue nil, InitializationState init_state)

	STATIC_ASSERT (NUMBER_OF_TYPES<=6)

State	state () const

	DEFINE_CALL_INTERFACE_DESCRIPTOR (CompareNil)

	DEFINE_HYDROGEN_CODE_STUB (CompareNilIC, HydrogenCodeStub)

Friends
class	CompareNilIC

OStream &	operator<< (OStream &os, const State &s)

Additional Inherited Members
Public Types inherited from v8::internal::HydrogenCodeStub
enum	InitializationState { UNINITIALIZED , INITIALIZED }

Protected Member Functions inherited from v8::internal::HydrogenCodeStub
	HydrogenCodeStub (Isolate *isolate, InitializationState state=INITIALIZED)

void	set_sub_minor_key (uint32_t key)

uint32_t	sub_minor_key () const

Static Protected Attributes inherited from v8::internal::HydrogenCodeStub
static const int	kSubMinorKeyBits = kStubMinorKeyBits - 1

Detailed Description

Definition at line 1314 of file code-stubs.h.

Member Enumeration Documentation

◆ CompareNilType

enum v8::internal::CompareNilICStub::CompareNilType

private

Enumerator
UNDEFINED
NULL_TYPE
MONOMORPHIC_MAP
GENERIC
NUMBER_OF_TYPES

Definition at line 1369 of file code-stubs.h.

                       {
     UNDEFINED,
     NULL_TYPE,
     MONOMORPHIC_MAP,
     GENERIC,
     NUMBER_OF_TYPES
   };

Constructor & Destructor Documentation

◆ CompareNilICStub() [1/3]

v8::internal::CompareNilICStub::CompareNilICStub	(	Isolate *	isolate,
		NilValue	nil
	)

inline

Definition at line 1319 of file code-stubs.h.

                                                    : HydrogenCodeStub(isolate) {
     set_sub_minor_key(NilValueBits::encode(nil));
   }

References v8::internal::BitFieldBase< T, shift, size, U >::encode(), and v8::internal::HydrogenCodeStub::set_sub_minor_key().

Referenced by GetUninitialized().

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◆ CompareNilICStub() [2/3]

v8::internal::CompareNilICStub::CompareNilICStub	(	Isolate *	isolate,
		ExtraICState	ic_state,
		InitializationState	init_state = `INITIALIZED`
	)

inline

Definition at line 1323 of file code-stubs.h.

       : HydrogenCodeStub(isolate, init_state) {
     set_sub_minor_key(ic_state);
   }

References v8::internal::HydrogenCodeStub::set_sub_minor_key().

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◆ CompareNilICStub() [3/3]

v8::internal::CompareNilICStub::CompareNilICStub	(	Isolate *	isolate,
		NilValue	nil,
		InitializationState	init_state
	)

inlineprivate

Definition at line 1363 of file code-stubs.h.

       : HydrogenCodeStub(isolate, init_state) {
     set_sub_minor_key(NilValueBits::encode(nil));
   }

References v8::internal::BitFieldBase< T, shift, size, U >::encode(), and v8::internal::HydrogenCodeStub::set_sub_minor_key().

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Member Function Documentation

◆ ClearState()

void v8::internal::CompareNilICStub::ClearState ( )

inline

Definition at line 1355 of file code-stubs.h.

                     {
     set_sub_minor_key(TypesBits::update(sub_minor_key(), 0));
   }

References v8::internal::HydrogenCodeStub::set_sub_minor_key(), v8::internal::HydrogenCodeStub::sub_minor_key(), and v8::internal::BitFieldBase< T, shift, size, U >::update().

Referenced by v8::internal::CompareNilIC::Clear().

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◆ DEFINE_CALL_INTERFACE_DESCRIPTOR()

v8::internal::CompareNilICStub::DEFINE_CALL_INTERFACE_DESCRIPTOR ( CompareNil )

private

◆ DEFINE_HYDROGEN_CODE_STUB()

v8::internal::CompareNilICStub::DEFINE_HYDROGEN_CODE_STUB	(	CompareNilIC	,
		HydrogenCodeStub
	)

private

◆ GetCodeKind()

virtual Code::Kind v8::internal::CompareNilICStub::GetCodeKind ( ) const

inlinevirtual

Reimplemented from v8::internal::HydrogenCodeStub.

Definition at line 1345 of file code-stubs.h.

1345 { return Code::COMPARE_NIL_IC; }

◆ GetExtraICState()

virtual ExtraICState v8::internal::CompareNilICStub::GetExtraICState ( ) const

inlinevirtual

Definition at line 1347 of file code-stubs.h.

1347 { return sub_minor_key(); }

References v8::internal::HydrogenCodeStub::sub_minor_key().

Referenced by v8::internal::PropertyICCompiler::ComputeCompareNil().

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◆ GetICState()

virtual InlineCacheState v8::internal::CompareNilICStub::GetICState ( ) const

inlinevirtual

Definition at line 1334 of file code-stubs.h.

                                               {
     State state = this->state();
     if (state.Contains(GENERIC)) {
       return MEGAMORPHIC;
     } else if (state.Contains(MONOMORPHIC_MAP)) {
       return MONOMORPHIC;
     } else {
       return PREMONOMORPHIC;
     }
   }

References v8::internal::EnumSet< E, T >::Contains(), GENERIC, v8::internal::MEGAMORPHIC, v8::internal::MONOMORPHIC, MONOMORPHIC_MAP, v8::internal::PREMONOMORPHIC, and state().

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◆ GetInputType()

Type * v8::internal::CompareNilICStub::GetInputType	(	Zone *	zone,
		Handle< Map >	map
	)

Definition at line 534 of file code-stubs.cc.

                                                                 {
   Type* output_type = GetType(zone, map);
   Type* nil_type =
       nil_value() == kNullValue ? Type::Null(zone) : Type::Undefined(zone);
   return Type::Union(output_type, nil_type, zone);
 }

References GetType(), v8::internal::kNullValue, map, nil_value(), v8::Null(), v8::Undefined(), and v8::internal::TypeImpl< ZoneTypeConfig >::Union().

Referenced by v8::internal::TypeFeedbackOracle::CompareType().

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◆ GetType()

Type * v8::internal::CompareNilICStub::GetType	(	Zone *	zone,
		Handle< Map >	map = `Handle<Map>()`
	)

Definition at line 513 of file code-stubs.cc.

                                                            {
   State state = this->state();
   if (state.Contains(CompareNilICStub::GENERIC)) return Type::Any(zone);
  
   Type* result = Type::None(zone);
   if (state.Contains(CompareNilICStub::UNDEFINED)) {
     result = Type::Union(result, Type::Undefined(zone), zone);
   }
   if (state.Contains(CompareNilICStub::NULL_TYPE)) {
     result = Type::Union(result, Type::Null(zone), zone);
   }
   if (state.Contains(CompareNilICStub::MONOMORPHIC_MAP)) {
     Type* type =
         map.is_null() ? Type::Detectable(zone) : Type::Class(map, zone);
     result = Type::Union(result, type, zone);
   }
  
   return result;
 }

References v8::internal::TypeImpl< ZoneTypeConfig >::Class(), v8::internal::EnumSet< E, T >::Contains(), GENERIC, map, MONOMORPHIC_MAP, v8::None, v8::Null(), NULL_TYPE, state(), v8::Undefined(), UNDEFINED, and v8::internal::TypeImpl< ZoneTypeConfig >::Union().

Referenced by v8::internal::CodeStubGraphBuilder< Stub >::BuildCodeInitializedStub(), v8::internal::TypeFeedbackOracle::CompareType(), and GetInputType().

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◆ GetUninitialized()

static Handle<Code> v8::internal::CompareNilICStub::GetUninitialized	(	Isolate *	isolate,
		NilValue	nil
	)

inlinestatic

Definition at line 1329 of file code-stubs.h.

                                                      {
     return CompareNilICStub(isolate, nil, UNINITIALIZED).GetCode();
   }

References CompareNilICStub(), and v8::internal::HydrogenCodeStub::UNINITIALIZED.

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◆ IsMonomorphic()

bool v8::internal::CompareNilICStub::IsMonomorphic ( ) const

inline

Definition at line 1351 of file code-stubs.h.

1351 { return state().Contains(MONOMORPHIC_MAP); }

References v8::internal::EnumSet< E, T >::Contains(), MONOMORPHIC_MAP, and state().

Referenced by v8::internal::CompareNilIC::CompareNil(), and UpdateStatus().

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◆ nil_value()

NilValue v8::internal::CompareNilICStub::nil_value ( ) const

inline

Definition at line 1353 of file code-stubs.h.

1353 { return NilValueBits::decode(sub_minor_key()); }

v8::internal::BitFieldBase::decode

static T decode(U value)

Definition: utils.h:228

References v8::internal::BitFieldBase< T, shift, size, U >::decode(), and v8::internal::HydrogenCodeStub::sub_minor_key().

Referenced by v8::internal::CompareNilIC::CompareNil(), GetInputType(), and PrintBaseName().

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◆ PrintBaseName()

void v8::internal::CompareNilICStub::PrintBaseName ( OStream & os ) const

virtual

Definition at line 470 of file code-stubs.cc.

                                                       {  // NOLINT
   CodeStub::PrintBaseName(os);
   os << ((nil_value() == kNullValue) ? "(NullValue)" : "(UndefinedValue)");
 }

References v8::internal::kNullValue, and nil_value().

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◆ PrintState()

void v8::internal::CompareNilICStub::PrintState ( OStream & os ) const

virtual

Definition at line 476 of file code-stubs.cc.

                                                    {  // NOLINT
   os << state();
 }

References state().

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◆ state()

State v8::internal::CompareNilICStub::state ( ) const

inlineprivate

Definition at line 1389 of file code-stubs.h.

1389 { return State(TypesBits::decode(sub_minor_key())); }

References v8::internal::BitFieldBase< T, shift, size, U >::decode(), and v8::internal::HydrogenCodeStub::sub_minor_key().

Referenced by GetICState(), GetType(), IsMonomorphic(), PrintState(), and UpdateStatus().

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◆ STATIC_ASSERT()

v8::internal::CompareNilICStub::STATIC_ASSERT ( NUMBER_OF_TYPES<= 6 )

private

◆ UpdateStatus()

void v8::internal::CompareNilICStub::UpdateStatus ( Handle< Object > object )

Definition at line 433 of file code-stubs.cc.

                                                          {
   State state = this->state();
   DCHECK(!state.Contains(GENERIC));
   State old_state = state;
   if (object->IsNull()) {
     state.Add(NULL_TYPE);
   } else if (object->IsUndefined()) {
     state.Add(UNDEFINED);
   } else if (object->IsUndetectableObject() ||
              object->IsOddball() ||
              !object->IsHeapObject()) {
     state.RemoveAll();
     state.Add(GENERIC);
   } else if (IsMonomorphic()) {
     state.RemoveAll();
     state.Add(GENERIC);
   } else {
     state.Add(MONOMORPHIC_MAP);
   }
   TraceTransition(old_state, state);
   set_sub_minor_key(TypesBits::update(sub_minor_key(), state.ToIntegral()));
 }

References v8::internal::EnumSet< E, T >::Add(), v8::internal::EnumSet< E, T >::Contains(), DCHECK, GENERIC, IsMonomorphic(), MONOMORPHIC_MAP, NULL_TYPE, v8::internal::EnumSet< E, T >::RemoveAll(), v8::internal::HydrogenCodeStub::set_sub_minor_key(), state(), v8::internal::HydrogenCodeStub::sub_minor_key(), v8::internal::EnumSet< E, T >::ToIntegral(), v8::internal::HydrogenCodeStub::TraceTransition(), UNDEFINED, and v8::internal::BitFieldBase< T, shift, size, U >::update().

Referenced by v8::internal::CompareNilIC::CompareNil().

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Friends And Related Function Documentation

◆ CompareNilIC

friend class CompareNilIC

friend

Definition at line 1394 of file code-stubs.h.

◆ operator<<

OStream& operator<<	(	OStream &	os,
		const State &	s
	)

friend

Definition at line 501 of file code-stubs.cc.

                                                                  {
   os << "(";
   SimpleListPrinter p(os);
   if (s.IsEmpty()) p.Add("None");
   if (s.Contains(CompareNilICStub::UNDEFINED)) p.Add("Undefined");
   if (s.Contains(CompareNilICStub::NULL_TYPE)) p.Add("Null");
   if (s.Contains(CompareNilICStub::MONOMORPHIC_MAP)) p.Add("MonomorphicMap");
   if (s.Contains(CompareNilICStub::GENERIC)) p.Add("Generic");
   return os << ")";
 }

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

/mnt/V8SourceCode/src/code-stubs.h
/mnt/V8SourceCode/src/code-stubs.cc

Classes

Public Member Functions

Static Public Member Functions

Private Types

Private Member Functions

Friends

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

◆ CompareNilType

Constructor & Destructor Documentation

◆ CompareNilICStub() [1/3]

◆ CompareNilICStub() [2/3]

◆ CompareNilICStub() [3/3]

Member Function Documentation

◆ ClearState()

◆ DEFINE_CALL_INTERFACE_DESCRIPTOR()

◆ DEFINE_HYDROGEN_CODE_STUB()

◆ GetCodeKind()

◆ GetExtraICState()

◆ GetICState()

◆ GetInputType()

◆ GetType()

◆ GetUninitialized()

◆ IsMonomorphic()

◆ nil_value()

◆ PrintBaseName()

◆ PrintState()

◆ state()

◆ STATIC_ASSERT()

◆ UpdateStatus()

Friends And Related Function Documentation

◆ CompareNilIC

◆ operator<<