[turbofan] escape analysis supports arguments object and rest elements

src/compiler/typer.cc

 // Copyright 2014 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.
 
 #include "src/compiler/typer.h"
 
 #include <iomanip>
 
 #include "src/base/flags.h"
 #include "src/bootstrapper.h"
@@ skipping 819 matching lines @@
   // TODO(rossberg): Ideally FrameState wouldn't have a value output.
   return Type::Internal();
 }
 
 Type* Typer::Visitor::TypeStateValues(Node* node) { return Type::Internal(); }
 
 Type* Typer::Visitor::TypeTypedStateValues(Node* node) {
   return Type::Internal();
 }
 
-Type* Typer::Visitor::TypeArgumentsObjectState(Node* node) {
+Type* Typer::Visitor::TypeArgumentsElementsState(Node* node) {
   return Type::Internal();
 }
 
 Type* Typer::Visitor::TypeObjectState(Node* node) { return Type::Internal(); }
 
 Type* Typer::Visitor::TypeTypedObjectState(Node* node) {
   return Type::Internal();
 }
 
 Type* Typer::Visitor::TypeCall(Node* node) { return Type::Any(); }
@@ skipping 1094 matching lines @@
 }
 
 Type* Typer::Visitor::TypeObjectIsString(Node* node) {
   return TypeUnaryOp(node, ObjectIsString);
 }
 
 Type* Typer::Visitor::TypeObjectIsUndetectable(Node* node) {
   return TypeUnaryOp(node, ObjectIsUndetectable);
 }
 
+Type* Typer::Visitor::TypeArgumentsLength(Node* node) {
+  return TypeCache::Get().kArgumentsLengthType;
+}
+
+Type* Typer::Visitor::TypeArgumentsFrame(Node* node) {
+  return Type::ExternalPointer();
+}
+
 Type* Typer::Visitor::TypeNewUnmappedArgumentsElements(Node* node) {
   return Type::OtherInternal();
 }
 
-Type* Typer::Visitor::TypeNewRestParameterElements(Node* node) {
-  return Type::OtherInternal();
-}
-
 Type* Typer::Visitor::TypeArrayBufferWasNeutered(Node* node) {
   return Type::Boolean();
 }
 
 // Heap constants.
 
 Type* Typer::Visitor::TypeConstant(Handle<Object> value) {
   if (Type::IsInteger(*value)) {
     return Type::Range(value->Number(), value->Number(), zone());
   }
   return Type::NewConstant(value, zone());
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8