#include <il.h>

Inheritance diagram for dart::StoreFieldInstr:

Public Types
enum class	Kind { kInitializing , kOther }

Public Types inherited from dart::TemplateInstruction< 2, NoThrow >
using	BaseClass = typename NoCSE< Instruction, PureInstruction >::Base

Public Member Functions
	StoreFieldInstr (const Slot &slot, Value instance, Value value, StoreBarrierType emit_store_barrier, InnerPointerAccess stores_inner_pointer, const InstructionSource &source, Kind kind=Kind::kOther, compiler::Assembler::MemoryOrder memory_order=compiler::Assembler::kRelaxedNonAtomic)

	StoreFieldInstr (const Slot &slot, Value instance, Value value, StoreBarrierType emit_store_barrier, const InstructionSource &source, Kind kind=Kind::kOther, compiler::Assembler::MemoryOrder memory_order=compiler::Assembler::kRelaxedNonAtomic)

	StoreFieldInstr (const Field &field, Value instance, Value value, StoreBarrierType emit_store_barrier, const InstructionSource &source, const ParsedFunction *parsed_function, Kind kind=Kind::kOther)

virtual SpeculativeMode	SpeculativeModeOfInput (intptr_t index) const

	DECLARE_ATTRIBUTES_NAMED (("slot", "is_initialization"),(&slot(), is_initialization())) enum

Value *	instance () const

const Slot &	slot () const

Value *	value () const

virtual TokenPosition	token_pos () const

bool	is_initialization () const

bool	ShouldEmitStoreBarrier () const

void	set_emit_store_barrier (StoreBarrierType value)

InnerPointerAccess	stores_inner_pointer () const

void	set_stores_inner_pointer (InnerPointerAccess value)

virtual bool	CanTriggerGC () const

virtual bool	ComputeCanDeoptimize () const

virtual intptr_t	DeoptimizationTarget () const

virtual bool	HasUnknownSideEffects () const

virtual bool	MayHaveVisibleEffect () const

virtual Representation	RequiredInputRepresentation (intptr_t index) const

virtual Instruction *	Canonicalize (FlowGraph *flow_graph)

DECLARE_INSTRUCTION_SERIALIZABLE_FIELDS(StoreFieldInstr, TemplateInstruction, FIELD_LIST) private intptr_t	OffsetInBytes () const

compiler::Assembler::CanBeSmi	CanValueBeSmi () const

	DISALLOW_COPY_AND_ASSIGN (StoreFieldInstr)

Public Member Functions inherited from dart::TemplateInstruction< 2, NoThrow >
	TemplateInstruction (intptr_t deopt_id=DeoptId::kNone)

	TemplateInstruction (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

Additional Inherited Members
Protected Attributes inherited from dart::TemplateInstruction< 2, NoThrow >
EmbeddedArray< Value *, N >	inputs_

Detailed Description

Definition at line 6283 of file il.h.

Member Enumeration Documentation

◆ Kind

enum class dart::StoreFieldInstr::Kind

strong

Enumerator
kInitializing
kOther

Definition at line 6285 of file il.h.

                  {
    // Store is known to be the first store into a slot of an object after
    // object was allocated and before it escapes (e.g. stores in constructor
    // initializer list).
    kInitializing,
 
    // All other stores.
    kOther,
  };

Constructor & Destructor Documentation

◆ StoreFieldInstr() [1/3]

dart::StoreFieldInstr::StoreFieldInstr	(	const Slot &	slot,
		Value *	instance,
		Value *	value,
		StoreBarrierType	emit_store_barrier,
		InnerPointerAccess	stores_inner_pointer,
		const InstructionSource &	source,
		Kind	kind = `Kind::kOther`,
		compiler::Assembler::MemoryOrder	memory_order = `compiler::Assembler::kRelaxedNonAtomic`
	)

inline

Definition at line 6295 of file il.h.

      : TemplateInstruction(source),
        slot_(slot),
        emit_store_barrier_(emit_store_barrier),
        memory_order_(memory_order),
        token_pos_(source.token_pos),
        is_initialization_(kind == Kind::kInitializing),
        stores_inner_pointer_(stores_inner_pointer) {
    switch (stores_inner_pointer) {
      case InnerPointerAccess::kNotUntagged:
        ASSERT(slot.representation() != kUntagged);
        break;
      case InnerPointerAccess::kMayBeInnerPointer:
        ASSERT(slot.representation() == kUntagged);
        ASSERT(slot.may_contain_inner_pointer());
        break;
      case InnerPointerAccess::kCannotBeInnerPointer:
        ASSERT(slot.representation() == kUntagged);
        break;
    }
    SetInputAt(kInstancePos, instance);
    SetInputAt(kValuePos, value);
  }

◆ StoreFieldInstr() [2/3]

dart::StoreFieldInstr::StoreFieldInstr	(	const Slot &	slot,
		Value *	instance,
		Value *	value,
		StoreBarrierType	emit_store_barrier,
		const InstructionSource &	source,
		Kind	kind = `Kind::kOther`,
		compiler::Assembler::MemoryOrder	memory_order = `compiler::Assembler::kRelaxedNonAtomic`
	)

inline

Definition at line 6328 of file il.h.

      : StoreFieldInstr(slot,
                        instance,
                        value,
                        emit_store_barrier,
                        InnerPointerAccess::kNotUntagged,
                        source,
                        kind,
                        memory_order) {}

◆ StoreFieldInstr() [3/3]

dart::StoreFieldInstr::StoreFieldInstr	(	const Field &	field,
		Value *	instance,
		Value *	value,
		StoreBarrierType	emit_store_barrier,
		const InstructionSource &	source,
		const ParsedFunction *	parsed_function,
		Kind	kind = `Kind::kOther`
	)

inline

Definition at line 6346 of file il.h.

      : StoreFieldInstr(Slot::Get(field, parsed_function),
                        instance,
                        value,
                        emit_store_barrier,
                        source,
                        kind) {}

Member Function Documentation

◆ Canonicalize()

Instruction * dart::StoreFieldInstr::Canonicalize ( FlowGraph * flow_graph )

virtual

Definition at line 1025 of file il.cc.

                                                                {
  // Dart objects are allocated null-initialized, which means we can eliminate
  // all initializing stores which store null value.
  // Context objects can be allocated uninitialized as a performance
  // optimization in JIT mode - however in AOT mode we always allocate them
  // null initialized.
  if (is_initialization_ && !slot().has_untagged_instance() &&
      slot().representation() == kTagged &&
      (!slot().IsContextSlot() ||
       !instance()->definition()->IsAllocateUninitializedContext()) &&
      value()->BindsToConstantNull()) {
    return nullptr;
  }
 
  if (slot().kind() == Slot::Kind::kPointerBase_data &&
      stores_inner_pointer() == InnerPointerAccess::kMayBeInnerPointer) {
    const intptr_t cid = instance()->Type()->ToNullableCid();
    // Pointers and ExternalTypedData objects never contain inner pointers.
    if (cid == kPointerCid || IsExternalTypedDataClassId(cid)) {
      set_stores_inner_pointer(InnerPointerAccess::kCannotBeInnerPointer);
    }
  }
  return this;
}

◆ CanTriggerGC()

virtual bool dart::StoreFieldInstr::CanTriggerGC ( ) const

inlinevirtual

Definition at line 6417 of file il.h.

6417{ return false; }

◆ CanValueBeSmi()

compiler::Assembler::CanBeSmi dart::StoreFieldInstr::CanValueBeSmi ( ) const

inline

Definition at line 6456 of file il.h.

                                                  {
    // Write barrier is skipped for nullable and non-nullable smis.
    ASSERT(value()->Type()->ToNullableCid() != kSmiCid);
    return value()->Type()->CanBeSmi() ? compiler::Assembler::kValueCanBeSmi
                                       : compiler::Assembler::kValueIsNotSmi;
  }

◆ ComputeCanDeoptimize()

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

inlinevirtual

Definition at line 6419 of file il.h.

6419{ return false; }

◆ DECLARE_ATTRIBUTES_NAMED()

dart::StoreFieldInstr::DECLARE_ATTRIBUTES_NAMED	(	("slot", "is_initialization")	,
		(&	slot,
		is_initialization()
	)

inline

Definition at line 6368 of file il.h.

6371 { kInstancePos = 0, kValuePos = 1 };

◆ DeoptimizationTarget()

virtual intptr_t dart::StoreFieldInstr::DeoptimizationTarget ( ) const

inlinevirtual

Definition at line 6422 of file il.h.

6422{ return GetDeoptId(); }

◆ DISALLOW_COPY_AND_ASSIGN()

dart::StoreFieldInstr::DISALLOW_COPY_AND_ASSIGN ( StoreFieldInstr )

◆ HasUnknownSideEffects()

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

inlinevirtual

Definition at line 6427 of file il.h.

6427{ return false; }

◆ instance()

Value * dart::StoreFieldInstr::instance ( ) const

inline

Definition at line 6373 of file il.h.

6373{ return inputs_[kInstancePos]; }

dart::TemplateInstruction< 2, NoThrow >::inputs_

EmbeddedArray< Value *, N > inputs_

Definition il.h:1516

◆ is_initialization()

bool dart::StoreFieldInstr::is_initialization ( ) const

inline

Definition at line 6378 of file il.h.

6378{ return is_initialization_; }

◆ MayHaveVisibleEffect()

virtual bool dart::StoreFieldInstr::MayHaveVisibleEffect ( ) const

inlinevirtual

Definition at line 6429 of file il.h.

6429{ return true; }

◆ OffsetInBytes()

DECLARE_INSTRUCTION_SERIALIZABLE_FIELDS(StoreFieldInstr, TemplateInstruction, FIELD_LIST) private intptr_t dart::StoreFieldInstr::OffsetInBytes ( ) const

inline

Definition at line 6454 of file il.h.

6454{ return slot().offset_in_bytes(); }

dart::Slot::offset_in_bytes

intptr_t offset_in_bytes() const

Definition slot.h:513

◆ RequiredInputRepresentation()

Representation dart::StoreFieldInstr::RequiredInputRepresentation ( intptr_t index ) const

virtual

Definition at line 1016 of file il.cc.

                          {
  if (index == 0) {
    return slot_.has_untagged_instance() ? kUntagged : kTagged;
  }
  ASSERT_EQUAL(index, 1);
  return slot().representation();
}

◆ set_emit_store_barrier()

void dart::StoreFieldInstr::set_emit_store_barrier ( StoreBarrierType value )

inline

Definition at line 6402 of file il.h.

                                                      {
    emit_store_barrier_ = value;
  }

◆ set_stores_inner_pointer()

void dart::StoreFieldInstr::set_stores_inner_pointer ( InnerPointerAccess value )

inline

Definition at line 6409 of file il.h.

                                                          {
    // We should never change this for a non-untagged field.
    ASSERT(stores_inner_pointer_ != InnerPointerAccess::kNotUntagged);
    // We only convert from may to cannot, never the other direction.
    ASSERT(value == InnerPointerAccess::kCannotBeInnerPointer);
    stores_inner_pointer_ = value;
  }

◆ ShouldEmitStoreBarrier()

bool dart::StoreFieldInstr::ShouldEmitStoreBarrier ( ) const

inline

Definition at line 6380 of file il.h.

                                      {
    if (slot().has_untagged_instance()) {
      // The instance is not a Dart object, so not traversed by the GC.
      return false;
    }
    if (slot().representation() != kTagged) {
      // The target field is native and unboxed, so not traversed by the GC.
      return false;
    }
    if (instance()->definition() == value()->definition()) {
      // `x.slot = x` cannot create an old->new or old&marked->old&unmarked
      // reference.
      return false;
    }
 
    if (value()->definition()->Type()->IsBool()) {
      return false;
    }
    return value()->NeedsWriteBarrier() &&
           (emit_store_barrier_ == kEmitStoreBarrier);
  }

◆ slot()

const Slot & dart::StoreFieldInstr::slot ( ) const

inline

Definition at line 6374 of file il.h.

6374{ return slot_; }

◆ SpeculativeModeOfInput()

virtual SpeculativeMode dart::StoreFieldInstr::SpeculativeModeOfInput ( intptr_t index ) const

inlinevirtual

Definition at line 6360 of file il.h.

                                                                       {
    // Slots are unboxed based on statically inferrable type information.
    // Either sound non-nullable static types (JIT) or global type flow analysis
    // results (AOT).
    return slot().representation() != kTagged ? kNotSpeculative : kGuardInputs;
  }

◆ stores_inner_pointer()

InnerPointerAccess dart::StoreFieldInstr::stores_inner_pointer ( ) const

inline

Definition at line 6406 of file il.h.

                                                  {
    return stores_inner_pointer_;
  }

◆ token_pos()

virtual TokenPosition dart::StoreFieldInstr::token_pos ( ) const

inlinevirtual

Definition at line 6377 of file il.h.

6377{ return token_pos_; }

◆ value()

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

inline

Definition at line 6375 of file il.h.

6375{ return inputs_[kValuePos]; }

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

Public Types

Public Member Functions

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

◆ Kind

Constructor & Destructor Documentation

◆ StoreFieldInstr() [1/3]

◆ StoreFieldInstr() [2/3]

◆ StoreFieldInstr() [3/3]

Member Function Documentation

◆ Canonicalize()

◆ CanTriggerGC()

◆ CanValueBeSmi()

◆ ComputeCanDeoptimize()

◆ DECLARE_ATTRIBUTES_NAMED()

◆ DeoptimizationTarget()

◆ DISALLOW_COPY_AND_ASSIGN()

◆ HasUnknownSideEffects()

◆ instance()

◆ is_initialization()

◆ MayHaveVisibleEffect()

◆ OffsetInBytes()

◆ RequiredInputRepresentation()

◆ set_emit_store_barrier()

◆ set_stores_inner_pointer()

◆ ShouldEmitStoreBarrier()

◆ slot()

◆ SpeculativeModeOfInput()

◆ stores_inner_pointer()

◆ token_pos()

◆ value()