[turbofan] Introduce JSCallForwardVarargs operator.

src/compiler/operator-properties.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/operator-properties.h"
 
 #include "src/compiler/js-operator.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/opcodes.h"
 
@@ skipping 77 matching lines @@
     case IrOpcode::kJSToInteger:
     case IrOpcode::kJSToLength:
     case IrOpcode::kJSToName:
     case IrOpcode::kJSToNumber:
     case IrOpcode::kJSToObject:
     case IrOpcode::kJSToString:
 
     // Call operations
     case IrOpcode::kJSCallConstruct:
     case IrOpcode::kJSCallConstructWithSpread:
+    case IrOpcode::kJSCallForwardVarargs:
     case IrOpcode::kJSCallFunction:
     case IrOpcode::kJSCallFunctionWithSpread:
 
     // Misc operations
     case IrOpcode::kJSConvertReceiver:
     case IrOpcode::kJSForInNext:
     case IrOpcode::kJSForInPrepare:
     case IrOpcode::kJSStackCheck:
     case IrOpcode::kJSGetSuperConstructor:
       return true;
@@ skipping 19 matching lines @@
          opcode == IrOpcode::kDead || opcode == IrOpcode::kLoop ||
          opcode == IrOpcode::kMerge || opcode == IrOpcode::kIfTrue ||
          opcode == IrOpcode::kIfFalse || opcode == IrOpcode::kIfSuccess ||
          opcode == IrOpcode::kIfException || opcode == IrOpcode::kIfValue ||
          opcode == IrOpcode::kIfDefault;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8