Make start node a value input to parameter nodes.

src/compiler/structured-machine-assembler.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/pipeline.h"
 #include "src/compiler/scheduler.h"
 #include "src/compiler/structured-machine-assembler.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 10 matching lines @@
     MachineRepresentation word)
     : GraphBuilder(graph),
       schedule_(new (zone()) Schedule(zone())),
       machine_(zone(), word),
       common_(zone()),
       call_descriptor_builder_(call_descriptor_builder),
       parameters_(NULL),
       current_environment_(new (zone())
                            Environment(zone(), schedule()->entry(), false)),
       number_of_variables_(0) {
+  Node* s = graph->NewNode(common_.Start(parameter_count()));
+  graph->SetStart(s);
   if (parameter_count() == 0) return;
   parameters_ = zone()->NewArray<Node*>(parameter_count());
   for (int i = 0; i < parameter_count(); ++i) {
-    parameters_[i] = NewNode(common()->Parameter(i));
+    parameters_[i] = NewNode(common()->Parameter(i), graph->start());
   }
 }
 
 
 Schedule* StructuredMachineAssembler::Export() {
   // Compute the correct codegen order.
   DCHECK(schedule_->rpo_order()->empty());
   Scheduler scheduler(zone(), graph(), schedule_);
   scheduler.ComputeSpecialRPO();
   // Invalidate MachineAssembler.
@@ skipping 609 matching lines @@
   }
   pending_header_merges_.clear();
   pending_exit_merges_.clear();
   header_environment_ = NULL;
   DCHECK(IsDone());
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8