[turbofan] Initial attempt to cleanup Node and related classes.

test/cctest/compiler/test-control-reducer.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/v8.h"
 #include "test/cctest/cctest.h"
 
 #include "src/base/bits.h"
 #include "src/compiler/common-operator.h"
 #include "src/compiler/control-reducer.h"
@@ skipping 34 matching lines @@
 static int CheckLoop(Node* node, Node* i0 = NULL, Node* i1 = NULL,
                      Node* i2 = NULL) {
   CHECK_EQ(IrOpcode::kLoop, node->opcode());
   int count = CheckInputs(node, i0, i1, i2);
   CHECK_EQ(count, node->op()->ControlInputCount());
   return count;
 }
 
 
 bool IsUsedBy(Node* a, Node* b) {
-  for (UseIter i = a->uses().begin(); i != a->uses().end(); ++i) {
-    if (b == *i) return true;
-  }
-  return false;
+  auto const uses = a->uses();
+  return std::find(uses.begin(), uses.end(), b) != uses.end();
 }
 
 
 // A helper for all tests dealing with ControlTester.
 class ControlReducerTester : HandleAndZoneScope {
  public:
   ControlReducerTester()
       : isolate(main_isolate()),
         common(main_zone()),
         graph(main_zone()),
@@ skipping 1600 matching lines @@
 
   Node* ret = R.Return(d1.phi, R.start, d1.merge);
 
   R.ReduceGraph();  // d1 gets folded true.
 
   CheckInputs(ret, y2, R.start, R.start);
   CheckDeadDiamond(d1);
   CheckDeadDiamond(d2);
   CheckDeadDiamond(d3);
 }