[turbofan] extend escape analysis to reduce CheckMaps

src/compiler/escape-analysis.h

Index: src/compiler/escape-analysis.h
diff --git a/src/compiler/escape-analysis.h b/src/compiler/escape-analysis.h
index 34960dde83f91fb8c1a25aadf3cc514f18b2c109..586610a68589c8759d73e3f12703646e39851fed 100644
--- a/src/compiler/escape-analysis.h
+++ b/src/compiler/escape-analysis.h
@@ -26,7 +26,7 @@ class V8_EXPORT_PRIVATE EscapeAnalysis {
   EscapeAnalysis(Graph* graph, CommonOperatorBuilder* common, Zone* zone);
   ~EscapeAnalysis();
 
-  void Run();
+  bool Run();
 
   Node* GetReplacement(Node* node);
   bool IsVirtual(Node* node);
@@ -44,6 +44,7 @@ class V8_EXPORT_PRIVATE EscapeAnalysis {
   void ProcessStoreField(Node* node);
   void ProcessLoadElement(Node* node);
   void ProcessStoreElement(Node* node);
+  void ProcessCheckMaps(Node* node);
   void ProcessAllocationUsers(Node* node);
   void ProcessAllocation(Node* node);
   void ProcessFinishRegion(Node* node);