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      1 // Copyright 2014 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_JS_INLINING_H_
      6 #define V8_COMPILER_JS_INLINING_H_
      7 
      8 #include "src/compiler/graph-reducer.h"
      9 #include "src/compiler/js-graph.h"
     10 
     11 namespace v8 {
     12 namespace internal {
     13 
     14 class BailoutId;
     15 class OptimizedCompilationInfo;
     16 
     17 namespace compiler {
     18 
     19 class SourcePositionTable;
     20 
     21 // The JSInliner provides the core graph inlining machinery. Note that this
     22 // class only deals with the mechanics of how to inline one graph into another,
     23 // heuristics that decide what and how much to inline are beyond its scope.
     24 class JSInliner final : public AdvancedReducer {
     25  public:
     26   JSInliner(Editor* editor, Zone* local_zone, OptimizedCompilationInfo* info,
     27             JSGraph* jsgraph, SourcePositionTable* source_positions)
     28       : AdvancedReducer(editor),
     29         local_zone_(local_zone),
     30         info_(info),
     31         jsgraph_(jsgraph),
     32         source_positions_(source_positions) {}
     33 
     34   const char* reducer_name() const override { return "JSInliner"; }
     35 
     36   // Reducer interface, eagerly inlines everything.
     37   Reduction Reduce(Node* node) final;
     38 
     39   // Can be used by inlining heuristics or by testing code directly, without
     40   // using the above generic reducer interface of the inlining machinery.
     41   Reduction ReduceJSCall(Node* node);
     42 
     43  private:
     44   Zone* zone() const { return local_zone_; }
     45   CommonOperatorBuilder* common() const;
     46   JSOperatorBuilder* javascript() const;
     47   SimplifiedOperatorBuilder* simplified() const;
     48   Graph* graph() const;
     49   JSGraph* jsgraph() const { return jsgraph_; }
     50   Isolate* isolate() const { return jsgraph_->isolate(); }
     51   Handle<Context> native_context() const;
     52 
     53   Zone* const local_zone_;
     54   OptimizedCompilationInfo* info_;
     55   JSGraph* const jsgraph_;
     56   SourcePositionTable* const source_positions_;
     57 
     58   bool DetermineCallTarget(Node* node,
     59                            Handle<SharedFunctionInfo>& shared_info_out);
     60   void DetermineCallContext(Node* node, Node*& context_out,
     61                             Handle<FeedbackVector>& feedback_vector_out);
     62 
     63   Node* CreateArtificialFrameState(Node* node, Node* outer_frame_state,
     64                                    int parameter_count, BailoutId bailout_id,
     65                                    FrameStateType frame_state_type,
     66                                    Handle<SharedFunctionInfo> shared);
     67 
     68   Reduction InlineCall(Node* call, Node* new_target, Node* context,
     69                        Node* frame_state, Node* start, Node* end,
     70                        Node* exception_target,
     71                        const NodeVector& uncaught_subcalls);
     72 };
     73 
     74 }  // namespace compiler
     75 }  // namespace internal
     76 }  // namespace v8
     77 
     78 #endif  // V8_COMPILER_JS_INLINING_H_
     79