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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_JS_GENERIC_LOWERING_H_
#define V8_COMPILER_JS_GENERIC_LOWERING_H_
#include "src/code-factory.h"
#include "src/compiler/graph-reducer.h"
#include "src/compiler/linkage.h"
#include "src/compiler/opcodes.h"
namespace v8 {
namespace internal {
namespace compiler {
// Forward declarations.
class CommonOperatorBuilder;
class JSGraph;
class MachineOperatorBuilder;
class Linkage;
// Lowers JS-level operators to runtime and IC calls in the "generic" case.
class JSGenericLowering FINAL : public Reducer {
public:
JSGenericLowering(bool is_typing_enabled, JSGraph* jsgraph);
~JSGenericLowering() FINAL;
Reduction Reduce(Node* node) FINAL;
protected:
#define DECLARE_LOWER(x) void Lower##x(Node* node);
// Dispatched depending on opcode.
JS_OP_LIST(DECLARE_LOWER)
#undef DECLARE_LOWER
// Helpers to replace existing nodes with a generic call.
void ReplaceWithCompareIC(Node* node, Token::Value token);
void ReplaceWithStubCall(Node* node, Callable c, CallDescriptor::Flags flags);
void ReplaceWithBuiltinCall(Node* node, Builtins::JavaScript id, int args);
void ReplaceWithRuntimeCall(Node* node, Runtime::FunctionId f, int args = -1);
// Helper for optimization of JSCallFunction.
bool TryLowerDirectJSCall(Node* node);
Zone* zone() const;
Isolate* isolate() const;
JSGraph* jsgraph() const { return jsgraph_; }
Graph* graph() const;
CommonOperatorBuilder* common() const;
MachineOperatorBuilder* machine() const;
private:
bool const is_typing_enabled_;
JSGraph* const jsgraph_;
};
} // namespace compiler
} // namespace internal
} // namespace v8
#endif // V8_COMPILER_JS_GENERIC_LOWERING_H_
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