[turbofan] Deopt support for escape analysis

src/compiler/escape-analysis.h

 // 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_ESCAPE_ANALYSIS_H_
 #define V8_COMPILER_ESCAPE_ANALYSIS_H_
 
 #include "src/base/flags.h"
 #include "src/compiler/graph.h"
 
@@ skipping 41 matching lines @@
   bool CheckUsesForEscape(Node* node, bool phi_escaping = false) {
     return CheckUsesForEscape(node, node, phi_escaping);
   }
   bool CheckUsesForEscape(Node* node, Node* rep, bool phi_escaping = false);
   void RevisitUses(Node* node);
   void RevisitInputs(Node* node);
   bool SetEscaped(Node* node);
   bool HasEntry(Node* node);
   void Resize();
   size_t size();
+  bool IsAllocationPhi(Node* node);
 
   Graph* graph() const { return graph_; }
   Zone* zone() const { return zone_; }
 
   EscapeAnalysis* object_analysis_;
   Graph* const graph_;
   Zone* const zone_;
   ZoneVector<EscapeStatusFlags> info_;
   ZoneDeque<Node*> queue_;
 
@@ skipping 13 matching lines @@
 class EscapeAnalysis {
  public:
   EscapeAnalysis(Graph* graph, CommonOperatorBuilder* common, Zone* zone);
   ~EscapeAnalysis();
 
   void Run();
 
   Node* GetReplacement(Node* node);
   bool IsVirtual(Node* node);
   bool IsEscaped(Node* node);
+  bool CompareVirtualObjects(Node* left, Node* right);
+  Node* GetOrCreateObjectState(Node* effect, Node* node);
 
  private:
   void RunObjectAnalysis();
   bool Process(Node* node);
   void ProcessLoadField(Node* node);
   void ProcessStoreField(Node* node);
   void ProcessLoadElement(Node* node);
   void ProcessStoreElement(Node* node);
   void ProcessAllocationUsers(Node* node);
   void ProcessAllocation(Node* node);
   void ProcessFinishRegion(Node* node);
   void ProcessCall(Node* node);
   void ProcessStart(Node* node);
   bool ProcessEffectPhi(Node* node);
   void ProcessLoadFromPhi(int offset, Node* from, Node* node,
                           VirtualState* states);
 
   void ForwardVirtualState(Node* node);
-
   bool IsEffectBranchPoint(Node* node);
   bool IsDanglingEffectNode(Node* node);
   int OffsetFromAccess(Node* node);
 
   VirtualObject* GetVirtualObject(Node* at, NodeId id);
   VirtualObject* ResolveVirtualObject(VirtualState* state, Node* node);
   Node* GetReplacementIfSame(ZoneVector<VirtualObject*>& objs);
 
   bool SetEscaped(Node* node);
   Node* replacement(NodeId id);
@@ skipping 20 matching lines @@
   MergeCache* cache_;
 
   DISALLOW_COPY_AND_ASSIGN(EscapeAnalysis);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_ESCAPE_ANALYSIS_H_