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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_COMMON_OPERATOR_REDUCER_H_
#define V8_COMPILER_COMMON_OPERATOR_REDUCER_H_
#include "src/base/compiler-specific.h"
#include "src/compiler/common-operator.h"
#include "src/compiler/graph-reducer.h"
namespace v8 {
namespace internal {
namespace compiler {
// Forward declarations.
class CommonOperatorBuilder;
class Graph;
class MachineOperatorBuilder;
class Operator;
// Performs strength reduction on nodes that have common operators.
class V8_EXPORT_PRIVATE CommonOperatorReducer final
: public NON_EXPORTED_BASE(AdvancedReducer) {
public:
CommonOperatorReducer(Editor* editor, Graph* graph, JSHeapBroker* broker,
CommonOperatorBuilder* common,
MachineOperatorBuilder* machine, Zone* temp_zone,
BranchSemantics default_branch_semantics);
~CommonOperatorReducer() final = default;
const char* reducer_name() const override { return "CommonOperatorReducer"; }
Reduction Reduce(Node* node) final;
private:
Reduction ReduceBranch(Node* node);
Reduction ReduceDeoptimizeConditional(Node* node);
Reduction ReduceMerge(Node* node);
Reduction ReduceEffectPhi(Node* node);
Reduction ReducePhi(Node* node);
Reduction ReduceReturn(Node* node);
Reduction ReduceSelect(Node* node);
Reduction ReduceSwitch(Node* node);
Reduction ReduceStaticAssert(Node* node);
Reduction ReduceTrapConditional(Node* node);
Reduction Change(Node* node, Operator const* op, Node* a);
Reduction Change(Node* node, Operator const* op, Node* a, Node* b);
// Helper to determine if conditions are true or false.
Decision DecideCondition(Node* const cond, BranchSemantics branch_semantics);
BranchSemantics BranchSemanticsOf(const Node* branch) {
BranchSemantics bs = BranchParametersOf(branch->op()).semantics();
if (bs != BranchSemantics::kUnspecified) return bs;
return default_branch_semantics_;
}
Graph* graph() const { return graph_; }
JSHeapBroker* broker() const { return broker_; }
CommonOperatorBuilder* common() const { return common_; }
MachineOperatorBuilder* machine() const { return machine_; }
Node* dead() const { return dead_; }
Graph* const graph_;
JSHeapBroker* const broker_;
CommonOperatorBuilder* const common_;
MachineOperatorBuilder* const machine_;
Node* const dead_;
Zone* zone_;
BranchSemantics default_branch_semantics_;
};
} // namespace compiler
} // namespace internal
} // namespace v8
#endif // V8_COMPILER_COMMON_OPERATOR_REDUCER_H_
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