| // Copyright 2015 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_GLOBAL_OBJECT_SPECIALIZATION_H_ |
| #define V8_COMPILER_JS_GLOBAL_OBJECT_SPECIALIZATION_H_ |
| |
| #include "src/compiler/graph-reducer.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| // Forward declarations. |
| class CompilationDependencies; |
| class TypeCache; |
| |
| |
| namespace compiler { |
| |
| // Forward declarations. |
| class CommonOperatorBuilder; |
| class JSGraph; |
| class JSOperatorBuilder; |
| class SimplifiedOperatorBuilder; |
| |
| |
| // Specializes a given JSGraph to a given global object, potentially constant |
| // folding some {JSLoadGlobal} nodes or strength reducing some {JSStoreGlobal} |
| // nodes. |
| class JSGlobalObjectSpecialization final : public AdvancedReducer { |
| public: |
| JSGlobalObjectSpecialization(Editor* editor, JSGraph* jsgraph, |
| MaybeHandle<Context> native_context, |
| CompilationDependencies* dependencies); |
| |
| Reduction Reduce(Node* node) final; |
| |
| private: |
| Reduction ReduceJSLoadGlobal(Node* node); |
| Reduction ReduceJSStoreGlobal(Node* node); |
| |
| // Retrieve the global object from the given {node} if known. |
| MaybeHandle<JSGlobalObject> GetGlobalObject(Node* node); |
| |
| struct ScriptContextTableLookupResult; |
| bool LookupInScriptContextTable(Handle<JSGlobalObject> global_object, |
| Handle<Name> name, |
| ScriptContextTableLookupResult* result); |
| |
| Graph* graph() const; |
| JSGraph* jsgraph() const { return jsgraph_; } |
| Isolate* isolate() const; |
| CommonOperatorBuilder* common() const; |
| JSOperatorBuilder* javascript() const; |
| SimplifiedOperatorBuilder* simplified() const; |
| MaybeHandle<Context> native_context() const { return native_context_; } |
| CompilationDependencies* dependencies() const { return dependencies_; } |
| |
| JSGraph* const jsgraph_; |
| MaybeHandle<Context> native_context_; |
| CompilationDependencies* const dependencies_; |
| TypeCache const& type_cache_; |
| |
| DISALLOW_COPY_AND_ASSIGN(JSGlobalObjectSpecialization); |
| }; |
| |
| } // namespace compiler |
| } // namespace internal |
| } // namespace v8 |
| |
| #endif // V8_COMPILER_JS_GLOBAL_OBJECT_SPECIALIZATION_H_ |