[turbofan] Introduce JSCallForwardVarargs operator.

src/compiler/common-operator.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/common-operator.h"
 
 #include "src/assembler.h"
 #include "src/base/lazy-instance.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/node.h"
@@ skipping 1230 matching lines @@
          bitmask.CountReal() == static_cast<int>(types->size()));
 #endif
 
   return new (zone()) Operator1<TypedStateValueInfo>(  // --
       IrOpcode::kTypedStateValues, Operator::kPure,    // opcode
       "TypedStateValues",                              // name
       static_cast<int>(types->size()), 0, 0, 1, 0, 0,  // counts
       TypedStateValueInfo(types, bitmask));            // parameters
 }
 
+const Operator* CommonOperatorBuilder::ArgumentsObjectState() {
+  return new (zone()) Operator(                          // --
+      IrOpcode::kArgumentsObjectState, Operator::kPure,  // opcode
+      "ArgumentsObjectState",                            // name
+      0, 0, 0, 1, 0, 0);                                 // counts
+}
+
 const Operator* CommonOperatorBuilder::ObjectState(int pointer_slots) {
   return new (zone()) Operator1<int>(           // --
       IrOpcode::kObjectState, Operator::kPure,  // opcode
       "ObjectState",                            // name
       pointer_slots, 0, 0, 1, 0, 0,             // counts
       pointer_slots);                           // parameter
 }
 
 const Operator* CommonOperatorBuilder::TypedObjectState(
     const ZoneVector<MachineType>* types) {
@@ skipping 96 matching lines @@
 CommonOperatorBuilder::CreateFrameStateFunctionInfo(
     FrameStateType type, int parameter_count, int local_count,
     Handle<SharedFunctionInfo> shared_info) {
   return new (zone()->New(sizeof(FrameStateFunctionInfo)))
       FrameStateFunctionInfo(type, parameter_count, local_count, shared_info);
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8