[turbofan] Reduce memory consumption of graph building

src/compiler/graph.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 "src/compiler/graph.h"
 
 #include "src/compiler/common-operator.h"
 #include "src/compiler/generic-node-inl.h"
 #include "src/compiler/graph-inl.h"
 #include "src/compiler/node.h"
 #include "src/compiler/node-aux-data-inl.h"
 #include "src/compiler/node-properties.h"
 #include "src/compiler/node-properties-inl.h"
+#include "src/compiler/opcodes.h"
 #include "src/compiler/operator-properties.h"
 #include "src/compiler/operator-properties-inl.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 Graph::Graph(Zone* zone) : GenericGraph<Node>(zone), decorators_(zone) {}
 
 
 void Graph::Decorate(Node* node) {
   for (ZoneVector<GraphDecorator*>::iterator i = decorators_.begin();
        i != decorators_.end(); ++i) {
     (*i)->Decorate(node);
   }
 }
 
 
-Node* Graph::NewNode(
-    const Operator* op, int input_count, Node** inputs, bool incomplete) {
+Node* Graph::NewNode(const Operator* op, int input_count, Node** inputs,
+                     bool incomplete) {
   DCHECK_LE(op->InputCount(), input_count);
-  Node* result = Node::New(this, input_count, inputs);
+  Node* result = Node::New(this, input_count, inputs, incomplete);
   result->Initialize(op);
-  if (!incomplete) Decorate(result);
+  if (!incomplete && !IrOpcode::IsControlOpcode(result->opcode())) {

[Michael Starzinger, 2014/10/27 09:34:19]

Is there a particular reason not to decorate control nodes?

+    Decorate(result);
+  }
   return result;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8