[turbofan] Introduce JSCallForwardVarargs operator.

src/compiler/verifier.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/verifier.h"
 
 #include <algorithm>
 #include <deque>
 #include <queue>
 #include <sstream>
@@ skipping 472 matching lines @@
       for (int i = 0; i < 3; ++i) {
         CHECK(NodeProperties::GetValueInput(node, i)->opcode() ==
                   IrOpcode::kStateValues ||
               NodeProperties::GetValueInput(node, i)->opcode() ==
                   IrOpcode::kTypedStateValues);
       }
       break;
     }
     case IrOpcode::kStateValues:
     case IrOpcode::kTypedStateValues:
+    case IrOpcode::kArgumentsObjectState:
     case IrOpcode::kObjectState:
     case IrOpcode::kTypedObjectState:
       // TODO(jarin): what are the constraints on these?
       break;
     case IrOpcode::kCall:
       // TODO(rossberg): what are the constraints on these?
       break;
     case IrOpcode::kTailCall:
       // TODO(bmeurer): what are the constraints on these?
       break;
@@ skipping 170 matching lines @@
       CheckTypeIs(node, Type::OtherInternal());
       break;
     }
 
     case IrOpcode::kJSCallConstruct:
     case IrOpcode::kJSCallConstructWithSpread:
     case IrOpcode::kJSConvertReceiver:
       // Type is Receiver.
       CheckTypeIs(node, Type::Receiver());
       break;
+    case IrOpcode::kJSCallForwardVarargs:
     case IrOpcode::kJSCallFunction:
     case IrOpcode::kJSCallFunctionWithSpread:
     case IrOpcode::kJSCallRuntime:
       // Type can be anything.
       CheckTypeIs(node, Type::Any());
       break;
 
     case IrOpcode::kJSForInPrepare: {
       // TODO(bmeurer): What are the constraints on thse?
       CheckTypeIs(node, Type::Any());
@@ skipping 995 matching lines @@
          replacement->op()->EffectOutputCount() > 0);
   DCHECK(!NodeProperties::IsFrameStateEdge(edge) ||
          replacement->opcode() == IrOpcode::kFrameState);
 }
 
 #endif  // DEBUG
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8