First draft of the sh4 port

src/sh4/register-allocator-sh4.h

-// Copyright 2006-2008 the V8 project authors. All rights reserved.
+// Copyright 2011-2012 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,
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-#ifndef GAY_SHORTEST_H_
-#define GAY_SHORTEST_H_
+#ifndef V8_SH4_REGISTER_ALLOCATOR_SH4_H_
+#define V8_SH4_REGISTER_ALLOCATOR_SH4_H_
 
 namespace v8 {
 namespace internal {
 
-struct PrecomputedShortest {
-  double v;
-  const char* representation;
-  int decimal_point;
+class RegisterAllocatorConstants : public AllStatic {
+ public:
+  static const int kNumRegisters = 5;
+  static const int kInvalidRegister = -1;
 };
 
-Vector<const PrecomputedShortest> PrecomputedShortestRepresentations();
 
 } }  // namespace v8::internal
 
-#endif  // GAY_SHORTEST_H_
+#endif  // V8_SH4_REGISTER_ALLOCATOR_SH4_H_