dart::StoreIndexedInstr Class Reference

#include <il.h>

Inheritance diagram for dart::StoreIndexedInstr:

Public Types
enum	{ kArrayPos = 0 , kIndexPos = 1 , kValuePos = 2 }
Public Types inherited from dart::TemplateInstruction< 3, NoThrow >
using	BaseClass = typename NoCSE< Instruction, PureInstruction >::Base

Public Member Functions
	StoreIndexedInstr (Value *array, Value *index, Value *value, StoreBarrierType emit_store_barrier, bool index_unboxed, intptr_t index_scale, intptr_t class_id, AlignmentType alignment, intptr_t deopt_id, const InstructionSource &source, SpeculativeMode speculative_mode=kGuardInputs)
Value *	array () const
Value *	index () const
Value *	value () const
intptr_t	index_scale () const
intptr_t	class_id () const
bool	aligned () const
bool	ShouldEmitStoreBarrier () const
void	set_emit_store_barrier (StoreBarrierType value)
virtual SpeculativeMode	SpeculativeModeOfInput (intptr_t index) const
virtual bool	ComputeCanDeoptimize () const
virtual Representation	RequiredInputRepresentation (intptr_t idx) const
bool	IsUntagged () const
virtual intptr_t	DeoptimizationTarget () const
virtual bool	HasUnknownSideEffects () const
virtual bool	MayHaveVisibleEffect () const
virtual Instruction *	Canonicalize (FlowGraph *flow_graph)
Public Member Functions inherited from dart::TemplateInstruction< 3, 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

Static Public Member Functions
static Representation	ValueRepresentation (intptr_t array_cid)

Additional Inherited Members
Protected Attributes inherited from dart::TemplateInstruction< 3, NoThrow >
EmbeddedArray< Value *, N >	inputs_

Detailed Description

Definition at line 7020 of file il.h.

Member Enumeration Documentation

anonymous enum

anonymous enum

Enumerator
kArrayPos
kIndexPos
kValuePos

Definition at line 7035 of file il.h.

{ kArrayPos = 0, kIndexPos = 1, kValuePos = 2 };

Constructor & Destructor Documentation

StoreIndexedInstr()

dart::StoreIndexedInstr::StoreIndexedInstr	(	Value *	array,
		Value *	index,
		Value *	value,
		StoreBarrierType	emit_store_barrier,
		bool	index_unboxed,
		intptr_t	index_scale,
		intptr_t	class_id,
		AlignmentType	alignment,
		intptr_t	deopt_id,
		const InstructionSource &	source,
		SpeculativeMode	speculative_mode = kGuardInputs
	)

Definition at line 6879 of file il.cc.

    : TemplateInstruction(source, deopt_id),
      emit_store_barrier_(emit_store_barrier),
      index_unboxed_(index_unboxed),
      index_scale_(index_scale),
      class_id_(class_id),
      alignment_(StrengthenAlignment(class_id, alignment)),
      token_pos_(source.token_pos),
      speculative_mode_(speculative_mode) {
  // In particular, notice that kPointerCid is _not_ supported because it gives
  // no information about whether the elements are signed for elements with
  // unboxed integer representations. The constructor must take that information
  // separately to allow kPointerCid.
  ASSERT(class_id != kPointerCid);
  SetInputAt(kArrayPos, array);
  SetInputAt(kIndexPos, index);
  SetInputAt(kValuePos, value);
}

Member Function Documentation

aligned()

bool dart::StoreIndexedInstr::aligned ( ) const

inline

Definition at line 7043 of file il.h.

{ return alignment_ == kAlignedAccess; }

array()

Value * dart::StoreIndexedInstr::array ( ) const

inline

Definition at line 7037 of file il.h.

{ return inputs_[kArrayPos]; }

Canonicalize()

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

virtual

Definition at line 6908 of file il.cc.

                                                                  {
  flow_graph->ExtractExternalUntaggedPayload(this, array(), class_id());
 
  if (auto box = index()->definition()->AsBoxInt64()) {
    // TODO(dartbug.com/39432): Make StoreIndexed fully suport unboxed indices.
    if (!box->ComputeCanDeoptimize() && compiler::target::kWordSize == 8) {
      auto Z = flow_graph->zone();
      auto store = new (Z) StoreIndexedInstr(
          array()->CopyWithType(Z), box->value()->CopyWithType(Z),
          value()->CopyWithType(Z), emit_store_barrier_,
          /*index_unboxed=*/true, index_scale(), class_id(), alignment_,
          GetDeoptId(), source(), speculative_mode_);
      flow_graph->InsertBefore(this, store, env(), FlowGraph::kEffect);
      return nullptr;
    }
  }
  return this;
}

class_id()

intptr_t dart::StoreIndexedInstr::class_id ( ) const

inline

Definition at line 7042 of file il.h.

{ return class_id_; }

ComputeCanDeoptimize()

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

inlinevirtual

Definition at line 7067 of file il.h.

{ return false; }

DeoptimizationTarget()

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

inlinevirtual

Definition at line 7080 of file il.h.

                                                {
    // Direct access since this instruction cannot deoptimize, and the deopt-id
    // was inherited from another instruction that could deoptimize.
    return GetDeoptId();
  }

HasUnknownSideEffects()

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

inlinevirtual

Definition at line 7086 of file il.h.

{ return false; }

index()

Value * dart::StoreIndexedInstr::index ( ) const

inline

Definition at line 7038 of file il.h.

{ return inputs_[kIndexPos]; }

index_scale()

intptr_t dart::StoreIndexedInstr::index_scale ( ) const

inline

Definition at line 7041 of file il.h.

{ return index_scale_; }

IsUntagged()

bool dart::StoreIndexedInstr::IsUntagged ( ) const

inline

Definition at line 7076 of file il.h.

                          {
    return array()->definition()->representation() == kUntagged;
  }

MayHaveVisibleEffect()

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

inlinevirtual

Definition at line 7088 of file il.h.

{ return true; }

RequiredInputRepresentation()

Representation dart::StoreIndexedInstr::RequiredInputRepresentation ( intptr_t  idx ) const

virtual

Definition at line 6932 of file il.cc.

                        {
  // Array can be a Dart object or a pointer to external data.
  if (idx == 0) return kNoRepresentation;  // Flexible input representation.
  if (idx == 1) {
    if (index_unboxed_) {
#if defined(TARGET_ARCH_IS_64_BIT)
      return kUnboxedInt64;
#else
      // TODO(dartbug.com/39432): kUnboxedInt32 || kUnboxedUint32 on 32-bit
      //  architectures.
      return kNoRepresentation;  // Index can be any unboxed representation.
#endif
    } else {
      return kTagged;  // Index is a smi.
    }
  }
  ASSERT(idx == 2);
  return ValueRepresentation(class_id());
}

set_emit_store_barrier()

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

inline

Definition at line 7059 of file il.h.

                                                      {
    emit_store_barrier_ = value;
  }

ShouldEmitStoreBarrier()

bool dart::StoreIndexedInstr::ShouldEmitStoreBarrier ( ) const

inline

Definition at line 7045 of file il.h.

                                      {
    if (array()->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);
  }

SpeculativeModeOfInput()

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

inlinevirtual

Definition at line 7063 of file il.h.

                                                                       {
    return speculative_mode_;
  }

value()

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

inline

Definition at line 7039 of file il.h.

{ return inputs_[kValuePos]; }

ValueRepresentation()

Representation dart::StoreIndexedInstr::ValueRepresentation ( intptr_t  array_cid )

static

Definition at line 6927 of file il.cc.

                                                                        {
  return Boxing::NativeRepresentation(
      RepresentationUtils::RepresentationOfArrayElement(array_cid));
}

---

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