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// Copyright 2014 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_SIMPLIFIED_LOWERING_H_
#define V8_COMPILER_SIMPLIFIED_LOWERING_H_
#include "src/compiler/js-graph.h"
#include "src/compiler/machine-operator.h"
#include "src/compiler/node-properties.h"
#include "src/compiler/node.h"
#include "src/compiler/simplified-operator.h"
namespace v8 {
namespace internal {
class TickCounter;
namespace compiler {
// Forward declarations.
class NodeOriginTable;
class ObserveNodeManager;
class RepresentationChanger;
class RepresentationSelector;
class SourcePositionTable;
class TypeCache;
class V8_EXPORT_PRIVATE SimplifiedLowering final {
public:
SimplifiedLowering(JSGraph* jsgraph, JSHeapBroker* broker, Zone* zone,
SourcePositionTable* source_position,
NodeOriginTable* node_origins,
TickCounter* tick_counter, Linkage* linkage,
ObserveNodeManager* observe_node_manager = nullptr);
~SimplifiedLowering() = default;
void LowerAllNodes();
void DoMax(Node* node, Operator const* op, MachineRepresentation rep);
void DoMin(Node* node, Operator const* op, MachineRepresentation rep);
void DoJSToNumberOrNumericTruncatesToFloat64(
Node* node, RepresentationSelector* selector);
void DoJSToNumberOrNumericTruncatesToWord32(Node* node,
RepresentationSelector* selector);
void DoIntegral32ToBit(Node* node);
void DoOrderedNumberToBit(Node* node);
void DoNumberToBit(Node* node);
void DoIntegerToUint8Clamped(Node* node);
void DoNumberToUint8Clamped(Node* node);
void DoSigned32ToUint8Clamped(Node* node);
void DoUnsigned32ToUint8Clamped(Node* node);
private:
// The purpose of this nested class is to hide method
// v8::internal::compiler::NodeProperties::ChangeOp which should not be
// directly used by code in SimplifiedLowering.
// SimplifiedLowering code should call SimplifiedLowering::ChangeOp instead,
// in order to notify the changes to ObserveNodeManager and support the
// %ObserveNode intrinsic.
class NodeProperties : public compiler::NodeProperties {
static void ChangeOp(Node* node, const Operator* new_op) { UNREACHABLE(); }
};
void ChangeOp(Node* node, const Operator* new_op);
JSGraph* const jsgraph_;
JSHeapBroker* broker_;
Zone* const zone_;
TypeCache const* type_cache_;
SetOncePointer<Node> to_number_code_;
SetOncePointer<Node> to_number_convert_big_int_code_;
SetOncePointer<Node> to_numeric_code_;
SetOncePointer<Operator const> to_number_operator_;
SetOncePointer<Operator const> to_number_convert_big_int_operator_;
SetOncePointer<Operator const> to_numeric_operator_;
// TODO(danno): SimplifiedLowering shouldn't know anything about the source
// positions table, but must for now since there currently is no other way to
// pass down source position information to nodes created during
// lowering. Once this phase becomes a vanilla reducer, it should get source
// position information via the SourcePositionWrapper like all other reducers.
SourcePositionTable* source_positions_;
NodeOriginTable* node_origins_;
TickCounter* const tick_counter_;
Linkage* const linkage_;
ObserveNodeManager* const observe_node_manager_;
Node* Float64Round(Node* const node);
Node* Float64Sign(Node* const node);
Node* Int32Abs(Node* const node);
Node* Int32Div(Node* const node);
Node* Int32Mod(Node* const node);
Node* Int32Sign(Node* const node);
Node* Uint32Div(Node* const node);
Node* Uint32Mod(Node* const node);
Node* ToNumberCode();
Node* ToNumberConvertBigIntCode();
Node* ToNumericCode();
Operator const* ToNumberOperator();
Operator const* ToNumberConvertBigIntOperator();
Operator const* ToNumericOperator();
friend class RepresentationSelector;
Isolate* isolate() { return jsgraph_->isolate(); }
Zone* zone() { return jsgraph_->zone(); }
JSGraph* jsgraph() { return jsgraph_; }
Graph* graph() { return jsgraph()->graph(); }
CommonOperatorBuilder* common() { return jsgraph()->common(); }
MachineOperatorBuilder* machine() { return jsgraph()->machine(); }
SimplifiedOperatorBuilder* simplified() { return jsgraph()->simplified(); }
Linkage* linkage() { return linkage_; }
};
} // namespace compiler
} // namespace internal
} // namespace v8
#endif // V8_COMPILER_SIMPLIFIED_LOWERING_H_
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