Add x64 implementation test support for assembler and code generator.

src/x64/codegen-x64.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 268 matching lines @@
 // CodeGenerator
 
 class CodeGenerator: public AstVisitor {
  public:
   // Takes a function literal, generates code for it. This function should only
   // be called by compiler.cc.
   static Handle<Code> MakeCode(FunctionLiteral* fun,
                                Handle<Script> script,
                                bool is_eval);
 
+  // During implementation of CodeGenerator, this call creates a
+  // CodeGenerator instance, and calls GenCode on it with a null
+  // function literal.  CodeGenerator will then construct and return
+  // a simple dummy function.  Call this during bootstrapping before
+  // trying to compile any real functions, to get CodeGenerator up
+  // and running.
+  // TODO(X64): Remove once we can get through the bootstrapping process.
+  static void TestCodeGenerator();
+
 #ifdef ENABLE_LOGGING_AND_PROFILING
   static bool ShouldGenerateLog(Expression* type);
 #endif
 
   static void SetFunctionInfo(Handle<JSFunction> fun,
                               int length,
                               int function_token_position,
                               int start_position,
                               int end_position,
                               bool is_expression,
@@ skipping 319 matching lines @@
   friend class Reference;
   friend class Result;
 
   DISALLOW_COPY_AND_ASSIGN(CodeGenerator);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_X64_CODEGEN_X64_H_