1 // Copyright 2015 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_ESCAPE_ANALYSIS_REDUCER_H_ 6 #define V8_COMPILER_ESCAPE_ANALYSIS_REDUCER_H_ 7 8 #include "src/bit-vector.h" 9 #include "src/compiler/escape-analysis.h" 10 #include "src/compiler/graph-reducer.h" 11 12 namespace v8 { 13 namespace internal { 14 namespace compiler { 15 16 // Forward declarations. 17 class JSGraph; 18 19 class EscapeAnalysisReducer final : public AdvancedReducer { 20 public: 21 EscapeAnalysisReducer(Editor* editor, JSGraph* jsgraph, 22 EscapeAnalysis* escape_analysis, Zone* zone); 23 24 Reduction Reduce(Node* node) final; 25 26 // Verifies that all virtual allocation nodes have been dealt with. Run it 27 // after this reducer has been applied. Has no effect in release mode. 28 void VerifyReplacement() const; 29 30 private: 31 Reduction ReduceLoad(Node* node); 32 Reduction ReduceStore(Node* node); 33 Reduction ReduceAllocate(Node* node); 34 Reduction ReduceFinishRegion(Node* node); 35 Reduction ReduceReferenceEqual(Node* node); 36 Reduction ReduceObjectIsSmi(Node* node); 37 Reduction ReduceFrameStateUses(Node* node); 38 Node* ReduceDeoptState(Node* node, Node* effect, bool multiple_users); 39 Node* ReduceStateValueInput(Node* node, int node_index, Node* effect, 40 bool node_multiused, bool already_cloned, 41 bool multiple_users); 42 jsgraph()43 JSGraph* jsgraph() const { return jsgraph_; } escape_analysis()44 EscapeAnalysis* escape_analysis() const { return escape_analysis_; } zone()45 Zone* zone() const { return zone_; } 46 Isolate* isolate() const; 47 48 JSGraph* const jsgraph_; 49 EscapeAnalysis* escape_analysis_; 50 Zone* const zone_; 51 // This bit vector marks nodes we already processed (allocs, loads, stores) 52 // and nodes that do not need a visit from ReduceDeoptState etc. 53 BitVector fully_reduced_; 54 bool exists_virtual_allocate_; 55 56 DISALLOW_COPY_AND_ASSIGN(EscapeAnalysisReducer); 57 }; 58 59 } // namespace compiler 60 } // namespace internal 61 } // namespace v8 62 63 #endif // V8_COMPILER_ESCAPE_ANALYSIS_REDUCER_H_ 64