Eliminate unnecessary depencencies in some header files....

src/register-allocator-inl.h

 // Copyright 2009 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
@@ skipping 30 matching lines @@
 #elif V8_TARGET_ARCH_MIPS
 #include "mips/register-allocator-mips-inl.h"
 #else
 #error Unsupported target architecture.
 #endif
 
 
 namespace v8 {
 namespace internal {
 
+Result::Result(const Result& other) {
+  other.CopyTo(this);
+}
+
+
+Result& Result::operator=(const Result& other) {
+  if (this != &other) {
+    Unuse();
+    other.CopyTo(this);
+  }
+  return *this;
+}
+
+
 Result::~Result() {
   if (is_register()) {
     CodeGeneratorScope::Current()->allocator()->Unuse(reg());
   }
 }
 
 
 void Result::Unuse() {
   if (is_register()) {
     CodeGeneratorScope::Current()->allocator()->Unuse(reg());
   }
   invalidate();
 }
 
 
 void Result::CopyTo(Result* destination) const {
   destination->value_ = value_;
   if (is_register()) {
     CodeGeneratorScope::Current()->allocator()->Use(reg());
   }
 }
 
 
+bool RegisterAllocator::is_used(Register reg) {
+  return registers_.is_used(ToNumber(reg));
+}
+
+
+int RegisterAllocator::count(Register reg) {
+  return registers_.count(ToNumber(reg));
+}
+
+
+void RegisterAllocator::Use(Register reg) {
+  registers_.Use(ToNumber(reg));
+}
+
+
+void RegisterAllocator::Unuse(Register reg) {
+  registers_.Unuse(ToNumber(reg));
+}
+
 } }  // namespace v8::internal
 
 #endif  // V8_REGISTER_ALLOCATOR_INL_H_