[turbofan] escape analysis supports arguments object and rest elements

src/compiler/simplified-operator.h

Index: src/compiler/simplified-operator.h
diff --git a/src/compiler/simplified-operator.h b/src/compiler/simplified-operator.h
index 969c33070edea3df44534bf6670bc9588fa83b72..674c58f2d3cd2f3fdb1bec71b7b46092092a8682 100644
--- a/src/compiler/simplified-operator.h
+++ b/src/compiler/simplified-operator.h
@@ -242,7 +242,8 @@ V8_EXPORT_PRIVATE std::ostream& operator<<(std::ostream&, NumberOperationHint);
 NumberOperationHint NumberOperationHintOf(const Operator* op)
     WARN_UNUSED_RESULT;
 
-int ParameterCountOf(const Operator* op) WARN_UNUSED_RESULT;
+int FormalParameterCountOf(const Operator* op) WARN_UNUSED_RESULT;
+bool IsRestLengthOf(const Operator* op) WARN_UNUSED_RESULT;
 
 PretenureFlag PretenureFlagOf(const Operator* op) WARN_UNUSED_RESULT;
 
@@ -419,11 +420,12 @@ class V8_EXPORT_PRIVATE SimplifiedOperatorBuilder final
   const Operator* ObjectIsString();
   const Operator* ObjectIsUndetectable();
 
-  // new-rest-parameter-elements
-  const Operator* NewRestParameterElements(int parameter_count);
+  const Operator* ArgumentsFrame();
+  const Operator* ArgumentsLength(int formal_parameter_count,
+                                  bool is_rest_length);
 
   // new-unmapped-arguments-elements
-  const Operator* NewUnmappedArgumentsElements(int parameter_count);
+  const Operator* NewUnmappedArgumentsElements();
 
   // array-buffer-was-neutered buffer
   const Operator* ArrayBufferWasNeutered();