Run ControlReducer early after graph building, then again later.

src/compiler/js-graph.h

 // 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.
 
 #ifndef V8_COMPILER_JS_GRAPH_H_
 #define V8_COMPILER_JS_GRAPH_H_
 
 #include "src/compiler/common-node-cache.h"
 #include "src/compiler/common-operator.h"
 #include "src/compiler/graph.h"
@@ skipping 49 matching lines @@
 
   // Creates a NumberConstant node, usually canonicalized.
   Node* Constant(int32_t value);
 
   // Creates a Int32Constant node, usually canonicalized.
   Node* Int32Constant(int32_t value);
   Node* Uint32Constant(uint32_t value) {
     return Int32Constant(bit_cast<int32_t>(value));
   }
 
+  // Creates a HeapConstant node for either true or false.
+  Node* BooleanConstant(bool is_true) {
+    return is_true ? TrueConstant() : FalseConstant();
+  }
+
   // Creates a Int64Constant node, usually canonicalized.
   Node* Int64Constant(int64_t value);
   Node* Uint64Constant(uint64_t value) {
     return Int64Constant(bit_cast<int64_t>(value));
   }
 
   // Creates a Int32Constant/Int64Constant node, depending on the word size of
   // the target machine.
   // TODO(turbofan): Code using Int32Constant/Int64Constant to store pointer
   // constants is probably not serializable.
@@ skipping 50 matching lines @@
   Factory* factory() { return isolate()->factory(); }
 
   DISALLOW_COPY_AND_ASSIGN(JSGraph);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif