Make start node a value input to parameter nodes.

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"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 SimplifiedGraphBuilder::SimplifiedGraphBuilder(
     Graph* graph, CommonOperatorBuilder* common,
     MachineOperatorBuilder* machine, SimplifiedOperatorBuilder* simplified)
     : StructuredGraphBuilder(graph, common),
       machine_(machine),
       simplified_(simplified) {}
 
 
-void SimplifiedGraphBuilder::Begin() {
+void SimplifiedGraphBuilder::Begin(int num_parameters) {
   DCHECK(graph()->start() == NULL);
-  Node* start = graph()->NewNode(common()->Start());
+  Node* start = graph()->NewNode(common()->Start(num_parameters));
   graph()->SetStart(start);
   set_environment(new (zone()) Environment(this, start));
 }
 
 
 void SimplifiedGraphBuilder::Return(Node* value) {
   Node* control = NewNode(common()->Return(), value);
   UpdateControlDependencyToLeaveFunction(control);
 }
 
@@ skipping 37 matching lines @@
 
 Node* SimplifiedGraphBuilder::Environment::Peek(size_t depth) {
   DCHECK(depth < values()->size());
   size_t index = values()->size() - depth - 1;
   return values()->at(index);
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8