[turbofan] Fix value output count for the Start node.

test/cctest/compiler/simplified-graph-builder.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 "test/cctest/compiler/simplified-graph-builder.h"
 
 #include "src/compiler/operator-properties.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 SimplifiedGraphBuilder::SimplifiedGraphBuilder(
     Isolate* isolate, Graph* graph, CommonOperatorBuilder* common,
     MachineOperatorBuilder* machine, SimplifiedOperatorBuilder* simplified)
     : GraphBuilder(isolate, graph),
       effect_(NULL),
       return_(NULL),
       common_(common),
       machine_(machine),
       simplified_(simplified) {}
 
 
 void SimplifiedGraphBuilder::Begin(int num_parameters) {
   DCHECK(graph()->start() == NULL);
-  Node* start = graph()->NewNode(common()->Start(num_parameters));
+  Node* start = graph()->NewNode(common()->Start(num_parameters + 3));
   graph()->SetStart(start);
   effect_ = start;
 }
 
 
 void SimplifiedGraphBuilder::Return(Node* value) {
   return_ =
       graph()->NewNode(common()->Return(), value, effect_, graph()->start());
   effect_ = NULL;
 }
@@ skipping 41 matching lines @@
     // This graph builder does not support control flow.
     CHECK_EQ(0, op->ControlOutputCount());
   }
 
   return result;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8