[turbofan] Introduce JSCallForwardVarargs operator.

src/compiler/simplified-lowering.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/simplified-lowering.h"
 
 #include <limits>
 
 #include "src/address-map.h"
 #include "src/base/bits.h"
@@ skipping 2643 matching lines @@
       case IrOpcode::kEffectPhi:
       case IrOpcode::kTerminate:
       case IrOpcode::kFrameState:
       case IrOpcode::kCheckpoint:
       case IrOpcode::kLoop:
       case IrOpcode::kMerge:
       case IrOpcode::kThrow:
       case IrOpcode::kBeginRegion:
       case IrOpcode::kProjection:
       case IrOpcode::kOsrValue:
+      case IrOpcode::kArgumentsObjectState:
 // All JavaScript operators except JSToNumber have uniform handling.
 #define OPCODE_CASE(name) case IrOpcode::k##name:
         JS_SIMPLE_BINOP_LIST(OPCODE_CASE)
         JS_OTHER_UNOP_LIST(OPCODE_CASE)
         JS_OBJECT_OP_LIST(OPCODE_CASE)
         JS_CONTEXT_OP_LIST(OPCODE_CASE)
         JS_OTHER_OP_LIST(OPCODE_CASE)
 #undef OPCODE_CASE
       case IrOpcode::kJSToInteger:
       case IrOpcode::kJSToLength:
@@ skipping 832 matching lines @@
         isolate(), graph()->zone(), callable.descriptor(), 0, flags,
         Operator::kNoProperties);
     to_number_operator_.set(common()->Call(desc));
   }
   return to_number_operator_.get();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8