Improve memory usage in Turbofan.

src/compiler/scheduler.cc

 // Copyright 2013 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 <deque>
 #include <queue>
 
 #include "src/compiler/scheduler.h"
 
 #include "src/compiler/graph.h"
@@ skipping 221 matching lines @@
       schedule_root_nodes_(zone),
       node_data_(graph_->NodeCount(), DefaultSchedulerData(), zone),
       has_floating_control_(false) {}
 
 
 Schedule* Scheduler::ComputeSchedule(Graph* graph) {
   Schedule* schedule;
   bool had_floating_control = false;
   do {
     Zone tmp_zone(graph->zone()->isolate());
-    schedule = new (graph->zone()) Schedule(graph->zone());
+    schedule = new (graph->zone())
+        Schedule(graph->zone(), static_cast<size_t>(graph->NodeCount()));
     Scheduler scheduler(&tmp_zone, graph, schedule);
 
     scheduler.BuildCFG();
 
     Scheduler::ComputeSpecialRPO(schedule);
     scheduler.GenerateImmediateDominatorTree();
 
     scheduler.PrepareUses();
     scheduler.ScheduleEarly();
     scheduler.ScheduleLate();
@@ skipping 863 matching lines @@
 
 #if DEBUG
   if (FLAG_trace_turbo_scheduler) PrintRPO(num_loops, loops, final_order);
   VerifySpecialRPO(num_loops, loops, final_order);
 #endif
   return final_order;
 }
 }
 }
 }  // namespace v8::internal::compiler