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      1 // Copyright 2018 the V8 project authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef V8_COMPILER_TYPE_NARROWING_REDUCER_H_
      6 #define V8_COMPILER_TYPE_NARROWING_REDUCER_H_
      7 
      8 #include "src/base/compiler-specific.h"
      9 #include "src/compiler/graph-reducer.h"
     10 #include "src/compiler/operation-typer.h"
     11 
     12 namespace v8 {
     13 namespace internal {
     14 namespace compiler {
     15 
     16 // Forward declarations.
     17 class JSGraph;
     18 
     19 class V8_EXPORT_PRIVATE TypeNarrowingReducer final
     20     : public NON_EXPORTED_BASE(AdvancedReducer) {
     21  public:
     22   TypeNarrowingReducer(Editor* editor, JSGraph* jsgraph,
     23                        JSHeapBroker* js_heap_broker);
     24   ~TypeNarrowingReducer() final;
     25 
     26   const char* reducer_name() const override { return "TypeNarrowingReducer"; }
     27 
     28   Reduction Reduce(Node* node) final;
     29 
     30  private:
     31   JSGraph* jsgraph() const { return jsgraph_; }
     32   Graph* graph() const;
     33   Zone* zone() const;
     34 
     35   JSGraph* const jsgraph_;
     36   OperationTyper op_typer_;
     37 
     38   DISALLOW_COPY_AND_ASSIGN(TypeNarrowingReducer);
     39 };
     40 
     41 }  // namespace compiler
     42 }  // namespace internal
     43 }  // namespace v8
     44 
     45 #endif  // V8_COMPILER_TYPE_NARROWING_REDUCER_H_
     46