[generators] Replace some runtime functions with Turbofan JS operators.

src/compiler/graph-reducer.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_GRAPH_REDUCER_H_
 #define V8_COMPILER_GRAPH_REDUCER_H_
 
 #include "src/compiler/node-marker.h"
 #include "src/zone-containers.h"
 
@@ skipping 56 matching lines @@
   class Editor {
    public:
     virtual ~Editor() {}
 
     // Replace {node} with {replacement}.
     virtual void Replace(Node* node, Node* replacement) = 0;
     // Revisit the {node} again later.
     virtual void Revisit(Node* node) = 0;
     // Replace value uses of {node} with {value} and effect uses of {node} with
     // {effect}. If {effect == nullptr}, then use the effect input to {node}.
-    // All
-    // control uses will be relaxed assuming {node} cannot throw.
+    // All control uses will be relaxed assuming {node} cannot throw.
     virtual void ReplaceWithValue(Node* node, Node* value, Node* effect,
                                   Node* control) = 0;
   };
 
   explicit AdvancedReducer(Editor* editor) : editor_(editor) {}
 
  protected:
   // Helper functions for subclasses to produce reductions for a node.
   static Reduction Replace(Node* node) { return Reducer::Replace(node); }
 
@@ skipping 87 matching lines @@
   ZoneStack<NodeState> stack_;
 
   DISALLOW_COPY_AND_ASSIGN(GraphReducer);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_GRAPH_REDUCER_H_