Refactor HInferRepresentation into an HPhase and use the phase zone.

src/hydrogen-infer-representation.h

-// Copyright 2010 the V8 project authors. All rights reserved.
+// Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
 //       with the distribution.
 //     * Neither the name of Google Inc. nor the names of its
 //       contributors may be used to endorse or promote products derived
 //       from this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-#ifndef V8_VM_STATE_H_
-#define V8_VM_STATE_H_
+#ifndef V8_HYDROGEN_INFER_REPRESENTATION_H_
+#define V8_HYDROGEN_INFER_REPRESENTATION_H_
 
-#include "allocation.h"
-#include "isolate.h"
+#include "hydrogen.h"
 
 namespace v8 {
 namespace internal {
 
-template <StateTag Tag>
-class VMState BASE_EMBEDDED {
+
+class HInferRepresentationPhase : public HPhase {
  public:
-  explicit inline VMState(Isolate* isolate);
-  inline ~VMState();
+  explicit HInferRepresentationPhase(HGraph* graph)
+      : HPhase("H_Infer representations", graph),
+        worklist_(8, zone()),
+        in_worklist_(graph->GetMaximumValueID(), zone()) { }
+
+  void Run();
+  void AddToWorklist(HValue* current);
 
  private:
-  Isolate* isolate_;
-  StateTag previous_tag_;
+  ZoneList<HValue*> worklist_;
+  BitVector in_worklist_;
+
+  DISALLOW_COPY_AND_ASSIGN(HInferRepresentationPhase);
 };
 
 
-class ExternalCallbackScope BASE_EMBEDDED {
- public:
-  inline ExternalCallbackScope(Isolate* isolate, Address callback);
-  inline ~ExternalCallbackScope();
- private:
-  Isolate* isolate_;
-  Address previous_callback_;
-};
-
 } }  // namespace v8::internal
 
-
-#endif  // V8_VM_STATE_H_
+#endif  // V8_HYDROGEN_INFER_REPRESENTATION_H_