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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_CONTEXT_SPECIALIZATION_H_
#define V8_COMPILER_JS_CONTEXT_SPECIALIZATION_H_
#include "src/compiler/graph-reducer.h"
namespace v8 {
namespace internal {
namespace compiler {
// Forward declarations.
class JSGraph;
class JSOperatorBuilder;
// Specializes a given JSGraph to a given context, potentially constant folding
// some {LoadContext} nodes or strength reducing some {StoreContext} nodes.
class JSContextSpecialization final : public AdvancedReducer {
public:
JSContextSpecialization(Editor* editor, JSGraph* jsgraph,
MaybeHandle<Context> context)
: AdvancedReducer(editor), jsgraph_(jsgraph), context_(context) {}
Reduction Reduce(Node* node) final;
private:
Reduction ReduceJSLoadContext(Node* node);
Reduction ReduceJSStoreContext(Node* node);
Reduction SimplifyJSStoreContext(Node* node, Node* new_context,
size_t new_depth);
Reduction SimplifyJSLoadContext(Node* node, Node* new_context,
size_t new_depth);
Isolate* isolate() const;
JSOperatorBuilder* javascript() const;
JSGraph* jsgraph() const { return jsgraph_; }
MaybeHandle<Context> context() const { return context_; }
JSGraph* const jsgraph_;
MaybeHandle<Context> context_;
DISALLOW_COPY_AND_ASSIGN(JSContextSpecialization);
};
} // namespace compiler
} // namespace internal
} // namespace v8
#endif // V8_COMPILER_JS_CONTEXT_SPECIALIZATION_H_
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