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// Copyright 2017 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef V8_COMPILER_PROPERTY_ACCESS_BUILDER_H_
#define V8_COMPILER_PROPERTY_ACCESS_BUILDER_H_
#include "src/base/optional.h"
#include "src/codegen/machine-type.h"
#include "src/compiler/js-heap-broker.h"
#include "src/compiler/node.h"
#include "src/handles/handles.h"
#include "src/zone/zone-containers.h"
namespace v8 {
namespace internal {
namespace compiler {
class CommonOperatorBuilder;
class CompilationDependencies;
class Graph;
class JSGraph;
class JSHeapBroker;
class PropertyAccessInfo;
class SimplifiedOperatorBuilder;
struct FieldAccess;
class PropertyAccessBuilder {
public:
PropertyAccessBuilder(JSGraph* jsgraph, JSHeapBroker* broker)
: jsgraph_(jsgraph), broker_(broker) {}
// Builds the appropriate string check if the maps are only string
// maps.
bool TryBuildStringCheck(JSHeapBroker* broker, ZoneVector<MapRef> const& maps,
Node** receiver, Effect* effect, Control control);
// Builds a number check if all maps are number maps.
bool TryBuildNumberCheck(JSHeapBroker* broker, ZoneVector<MapRef> const& maps,
Node** receiver, Effect* effect, Control control);
void BuildCheckMaps(Node* object, Effect* effect, Control control,
ZoneVector<MapRef> const& maps);
Node* BuildCheckValue(Node* receiver, Effect* effect, Control control,
Handle<HeapObject> value);
// Builds the actual load for data-field and data-constant-field
// properties (without heap-object or map checks).
Node* BuildLoadDataField(NameRef const& name,
PropertyAccessInfo const& access_info,
Node* lookup_start_object, Node** effect,
Node** control);
// Tries to load a constant value from a prototype object in dictionary mode
// and constant-folds it. Returns {} if the constant couldn't be safely
// retrieved.
base::Optional<Node*> FoldLoadDictPrototypeConstant(
PropertyAccessInfo const& access_info);
static MachineRepresentation ConvertRepresentation(
Representation representation);
private:
JSGraph* jsgraph() const { return jsgraph_; }
JSHeapBroker* broker() const { return broker_; }
CompilationDependencies* dependencies() const {
return broker_->dependencies();
}
Graph* graph() const;
Isolate* isolate() const;
CommonOperatorBuilder* common() const;
SimplifiedOperatorBuilder* simplified() const;
Node* TryFoldLoadConstantDataField(NameRef const& name,
PropertyAccessInfo const& access_info,
Node* lookup_start_object);
// Returns a node with the holder for the property access described by
// {access_info}.
Node* ResolveHolder(PropertyAccessInfo const& access_info,
Node* lookup_start_object);
Node* BuildLoadDataField(NameRef const& name, Node* holder,
FieldAccess& field_access, bool is_inobject,
Node** effect, Node** control);
JSGraph* jsgraph_;
JSHeapBroker* broker_;
};
bool HasOnlyStringMaps(JSHeapBroker* broker, ZoneVector<MapRef> const& maps);
} // namespace compiler
} // namespace internal
} // namespace v8
#endif // V8_COMPILER_PROPERTY_ACCESS_BUILDER_H_
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