#include <il.h>

Inheritance diagram for dart::RedefinitionInstr:

Public Member Functions
	RedefinitionInstr (Value *value, bool inserted_by_constant_propagation=false)

Value *	value () const

virtual CompileType	ComputeType () const

virtual bool	RecomputeType ()

virtual Definition *	Canonicalize (FlowGraph *flow_graph)

void	set_constrained_type (CompileType *type)

CompileType *	constrained_type () const

bool	inserted_by_constant_propagation () const

virtual bool	ComputeCanDeoptimize () const

virtual bool	HasUnknownSideEffects () const

virtual Value *	RedefinedValue () const

Public Member Functions inherited from dart::TemplateDefinition< 1, NoThrow >
	TemplateDefinition (intptr_t deopt_id=DeoptId::kNone)

	TemplateDefinition (const InstructionSource &source, intptr_t deopt_id=DeoptId::kNone)

virtual intptr_t	InputCount () const

virtual Value *	InputAt (intptr_t i) const

virtual bool	MayThrow () const

Public Member Functions inherited from dart::Instruction
	Instruction (const InstructionSource &source, intptr_t deopt_id=DeoptId::kNone)

	Instruction (intptr_t deopt_id=DeoptId::kNone)

virtual	~Instruction ()

virtual Tag	tag () const =0

virtual intptr_t	statistics_tag () const

intptr_t	deopt_id () const

virtual TokenPosition	token_pos () const

InstructionSource	source () const

virtual intptr_t	InputCount () const =0

virtual Value *	InputAt (intptr_t i) const =0

void	SetInputAt (intptr_t i, Value *value)

InputsIterable	inputs ()

void	UnuseAllInputs ()

virtual intptr_t	ArgumentCount () const

Value *	ArgumentValueAt (intptr_t index) const

Definition *	ArgumentAt (intptr_t index) const

virtual void	SetMoveArguments (MoveArgumentsArray *move_arguments)

virtual MoveArgumentsArray *	GetMoveArguments () const

virtual void	ReplaceInputsWithMoveArguments (MoveArgumentsArray *move_arguments)

bool	HasMoveArguments () const

void	RepairArgumentUsesInEnvironment () const

virtual bool	ComputeCanDeoptimize () const =0

virtual bool	ComputeCanDeoptimizeAfterCall () const

bool	CanDeoptimize () const

virtual void	Accept (InstructionVisitor *visitor)=0

Instruction *	previous () const

void	set_previous (Instruction *instr)

Instruction *	next () const

void	set_next (Instruction *instr)

void	LinkTo (Instruction *next)

Instruction *	RemoveFromGraph (bool return_previous=true)

virtual intptr_t	SuccessorCount () const

virtual BlockEntryInstr *	SuccessorAt (intptr_t index) const

SuccessorsIterable	successors () const

void	Goto (JoinEntryInstr *entry)

virtual const char *	DebugName () const =0

void	CheckField (const Field &field) const

const char *	ToCString () const

	DECLARE_INSTRUCTION_TYPE_CHECK (BlockEntryWithInitialDefs, BlockEntryWithInitialDefs) template< typename T > T *Cast()

template<typename T >
const T *	Cast () const

LocationSummary *	locs ()

bool	HasLocs () const

virtual LocationSummary *	MakeLocationSummary (Zone *zone, bool is_optimizing) const =0

void	InitializeLocationSummary (Zone *zone, bool optimizing)

virtual void	EmitNativeCode (FlowGraphCompiler *compiler)

Environment *	env () const

void	SetEnvironment (Environment *deopt_env)

void	RemoveEnvironment ()

void	ReplaceInEnvironment (Definition current, Definition replacement)

virtual intptr_t	NumberOfInputsConsumedBeforeCall () const

intptr_t	GetPassSpecificId (CompilerPass::Id pass) const

void	SetPassSpecificId (CompilerPass::Id pass, intptr_t id)

bool	HasPassSpecificId (CompilerPass::Id pass) const

bool	HasUnmatchedInputRepresentations () const

virtual Representation	RequiredInputRepresentation (intptr_t idx) const

SpeculativeMode	SpeculativeModeOfInputs () const

virtual SpeculativeMode	SpeculativeModeOfInput (intptr_t index) const

virtual Representation	representation () const

bool	WasEliminated () const

virtual intptr_t	DeoptimizationTarget () const

virtual Instruction *	Canonicalize (FlowGraph *flow_graph)

void	InsertBefore (Instruction *next)

void	InsertAfter (Instruction *prev)

Instruction *	AppendInstruction (Instruction *tail)

virtual bool	AllowsCSE () const

virtual bool	HasUnknownSideEffects () const =0

virtual bool	CanCallDart () const

virtual bool	CanTriggerGC () const

virtual BlockEntryInstr *	GetBlock ()

virtual intptr_t	inlining_id () const

virtual void	set_inlining_id (intptr_t value)

virtual bool	has_inlining_id () const

virtual uword	Hash () const

bool	Equals (const Instruction &other) const

virtual bool	AttributesEqual (const Instruction &other) const

void	InheritDeoptTarget (Zone zone, Instruction other)

bool	NeedsEnvironment () const

virtual bool	CanBecomeDeoptimizationTarget () const

void	InheritDeoptTargetAfter (FlowGraph flow_graph, Definition call, Definition *result)

virtual bool	MayThrow () const =0

virtual bool	MayHaveVisibleEffect () const

virtual bool	CanEliminate (const BlockEntryInstr *block) const

bool	CanEliminate ()

bool	IsDominatedBy (Instruction *dom)

void	ClearEnv ()

void	Unsupported (FlowGraphCompiler *compiler)

virtual bool	UseSharedSlowPathStub (bool is_optimizing) const

Location::Kind	RegisterKindForResult () const

Public Member Functions inherited from dart::ZoneAllocated
	ZoneAllocated ()

void *	operator new (size_t size)

void *	operator new (size_t size, Zone *zone)

void	operator delete (void *pointer)

Additional Inherited Members
Public Types inherited from dart::TemplateDefinition< 1, NoThrow >
using	BaseClass = typename NoCSE< Definition, PureDefinition >::Base

Public Types inherited from dart::Instruction
enum	Tag { FOR_EACH_INSTRUCTION =(DECLARE_TAG) kNumInstructions }

enum	SpeculativeMode { kGuardInputs , kNotSpeculative }

using	InputsIterable = InstructionIndexedPropertyIterable< InputsTrait >

using	SuccessorsIterable = InstructionIndexedPropertyIterable< SuccessorsTrait >

Static Public Member Functions inherited from dart::Instruction
static const ICData *	GetICData (const ZoneGrowableArray< const ICData * > &ic_data_array, intptr_t deopt_id, bool is_static_call)

static LocationSummary *	MakeCallSummary (Zone zone, const Instruction instr, LocationSummary *locs=nullptr)

static bool	SlowPathSharingSupported (bool is_optimizing)

Static Public Attributes inherited from dart::Instruction
static const intptr_t	kInstructionAttrs [kNumInstructions]

Protected Member Functions inherited from dart::Instruction
intptr_t	GetDeoptId () const

virtual void	CopyDeoptIdFrom (const Instruction &instr)

void	WriteExtraWithoutInputs (FlowGraphSerializer *s)

void	ReadExtraWithoutInputs (FlowGraphDeserializer *d)

Protected Attributes inherited from dart::TemplateDefinition< 1, NoThrow >
EmbeddedArray< Value *, N >	inputs_

Detailed Description

Definition at line 4098 of file il.h.

Constructor & Destructor Documentation

◆ RedefinitionInstr()

dart::RedefinitionInstr::RedefinitionInstr	(	Value *	value,
		bool	inserted_by_constant_propagation = `false`
	)

inlineexplicit

Definition at line 4100 of file il.h.

      : constrained_type_(nullptr),
        inserted_by_constant_propagation_(inserted_by_constant_propagation) {
    SetInputAt(0, value);
  }

Member Function Documentation

◆ Canonicalize()

Definition * dart::RedefinitionInstr::Canonicalize ( FlowGraph * flow_graph )

virtual

Reimplemented from dart::Instruction.

Definition at line 2637 of file il.cc.

                                                                 {
  // Must not remove Redefinitions without uses until LICM, even though
  // Redefinition might not have any uses itself it can still be dominating
  // uses of the value it redefines and must serve as a barrier for those
  // uses. RenameUsesDominatedByRedefinitions would normalize the graph and
  // route those uses through this redefinition.
  if (!HasUses() && !flow_graph->is_licm_allowed()) {
    return nullptr;
  }
  if (constrained_type() != nullptr &&
      constrained_type()->IsEqualTo(value()->Type())) {
    return value()->definition();
  }
  return this;
}

◆ ComputeCanDeoptimize()

virtual bool dart::RedefinitionInstr::ComputeCanDeoptimize ( ) const

inlinevirtual

Implements dart::Instruction.

Definition at line 4123 of file il.h.

4123{ return false; }

◆ ComputeType()

CompileType dart::RedefinitionInstr::ComputeType ( ) const

virtual

Definition at line 1117 of file type_propagator.cc.

                                                 {
  if (constrained_type_ != nullptr) {
    // Check if the type associated with this redefinition is more specific
    // than the type of its input. If yes, return it. Otherwise, fall back
    // to the input's type.
 
    // If either type is non-nullable, the resulting type is non-nullable.
    const bool is_nullable =
        value()->Type()->is_nullable() && constrained_type_->is_nullable();
    // The resulting type can be the sentinel value only if both types can be.
    const bool can_be_sentinel = value()->Type()->can_be_sentinel() &&
                                 constrained_type_->can_be_sentinel();
 
    // If either type has a concrete cid, stick with it.
    if (value()->Type()->ToNullableCid() != kDynamicCid) {
      return CompileType(is_nullable, can_be_sentinel,
                         value()->Type()->ToNullableCid(), nullptr);
    }
    if (constrained_type_->ToNullableCid() != kDynamicCid) {
      return CompileType(is_nullable, can_be_sentinel,
                         constrained_type_->ToNullableCid(), nullptr);
    }
 
    CompileType result(
        value()->Type()->IsSubtypeOf(*constrained_type_->ToAbstractType())
            ? *value()->Type()
            : *constrained_type_);
    if (!is_nullable) {
      result = result.CopyNonNullable();
    }
    if (!can_be_sentinel) {
      result = result.CopyNonSentinel();
    }
    return result;
  }
  return *value()->Type();
}

◆ constrained_type()

CompileType * dart::RedefinitionInstr::constrained_type ( ) const

inline

Definition at line 4117 of file il.h.

4117{ return constrained_type_; }

◆ HasUnknownSideEffects()

virtual bool dart::RedefinitionInstr::HasUnknownSideEffects ( ) const

inlinevirtual

Implements dart::Instruction.

Definition at line 4124 of file il.h.

4124{ return false; }

◆ inserted_by_constant_propagation()

bool dart::RedefinitionInstr::inserted_by_constant_propagation ( ) const

inline

Definition at line 4119 of file il.h.

                                                {
    return inserted_by_constant_propagation_;
  }

◆ RecomputeType()

bool dart::RedefinitionInstr::RecomputeType ( )

virtual

Definition at line 1155 of file type_propagator.cc.

                                      {
  return UpdateType(ComputeType());
}

◆ RedefinedValue()

Value * dart::RedefinitionInstr::RedefinedValue ( ) const

virtual

Definition at line 545 of file il.cc.

                                               {
  return value();
}

◆ set_constrained_type()

void dart::RedefinitionInstr::set_constrained_type ( CompileType * type )

inline

Definition at line 4116 of file il.h.

4116{ constrained_type_ = type; }

type

GLenum type

Definition: blit_command_gles.cc:126

◆ value()

Value * dart::RedefinitionInstr::value ( ) const

inline

Definition at line 4109 of file il.h.

4109{ return inputs_[0]; }

dart::TemplateDefinition< 1, NoThrow >::inputs_

EmbeddedArray< Value *, N > inputs_

Definition: il.h:2762

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

third_party/dart-lang/sdk/runtime/vm/compiler/backend/il.h
third_party/dart-lang/sdk/runtime/vm/compiler/backend/il.cc
third_party/dart-lang/sdk/runtime/vm/compiler/backend/type_propagator.cc

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ RedefinitionInstr()

Member Function Documentation

◆ Canonicalize()

◆ ComputeCanDeoptimize()

◆ ComputeType()

◆ constrained_type()

◆ HasUnknownSideEffects()

◆ inserted_by_constant_propagation()

◆ RecomputeType()

◆ RedefinedValue()

◆ set_constrained_type()

◆ value()