[turbofan] Correctify representation changes to bit.

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"
 #include "src/compiler/js-operator.h"
 #include "src/compiler/machine-operator.h"
 #include "src/compiler/node-properties.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
+// Forward declarations.
 class Typer;
 
 // Implements a facade on a Graph, enhancing the graph with JS-specific
 // notions, including a builder for for JS* operators, canonicalized global
 // constants, and various helper methods.
 class JSGraph : public ZoneObject {
  public:
   JSGraph(Graph* graph, CommonOperatorBuilder* common,
           JSOperatorBuilder* javascript, MachineOperatorBuilder* machine)
       : graph_(graph),
@@ skipping 73 matching lines @@
 
   Node* SmiConstant(int32_t immediate) {
     DCHECK(Smi::IsValid(immediate));
     return Constant(immediate);
   }
 
   // Creates a dummy Constant node, used to satisfy calling conventions of
   // stubs and runtime functions that do not require a context.
   Node* NoContextConstant() { return ZeroConstant(); }
 
+  // Cached common types.
+  Type* ZeroOneRangeType();
+
   JSOperatorBuilder* javascript() { return javascript_; }
   CommonOperatorBuilder* common() { return common_; }
   MachineOperatorBuilder* machine() { return machine_; }
   Graph* graph() { return graph_; }
   Zone* zone() { return graph()->zone(); }
   Isolate* isolate() { return zone()->isolate(); }
   Factory* factory() { return isolate()->factory(); }
 
   void GetCachedNodes(NodeVector* nodes);
 
  private:
   Graph* graph_;
   CommonOperatorBuilder* common_;
   JSOperatorBuilder* javascript_;
   MachineOperatorBuilder* machine_;
 
   // TODO(titzer): make this into a simple array.
   SetOncePointer<Node> c_entry_stub_constant_;
   SetOncePointer<Node> undefined_constant_;
   SetOncePointer<Node> the_hole_constant_;
   SetOncePointer<Node> true_constant_;
   SetOncePointer<Node> false_constant_;
   SetOncePointer<Node> null_constant_;
   SetOncePointer<Node> zero_constant_;
   SetOncePointer<Node> one_constant_;
   SetOncePointer<Node> nan_constant_;
 
+  SetOncePointer<Type> zero_one_range_type_;
+
   CommonNodeCache cache_;
 
   Node* ImmovableHeapConstant(Handle<HeapObject> value);
   Node* NumberConstant(double value);
 
   DISALLOW_COPY_AND_ASSIGN(JSGraph);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif