Make (most of) --trace-codegen available in release mode. Better output.

src/x64/codegen-x64.h

 // Copyright 2011 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 33 matching lines @@
 
 class CodeGenerator: public AstVisitor {
  public:
   CodeGenerator() {
     InitializeAstVisitor();
   }
 
   static bool MakeCode(CompilationInfo* info);
 
   // Printing of AST, etc. as requested by flags.
-  static void MakeCodePrologue(CompilationInfo* info);
+  static void MakeCodePrologue(CompilationInfo* info, const char* kind);
 
   // Allocate and install the code.
   static Handle<Code> MakeCodeEpilogue(MacroAssembler* masm,
                                        Code::Flags flags,
                                        CompilationInfo* info);
 
   // Print the code after compiling it.
   static void PrintCode(Handle<Code> code, CompilationInfo* info);
 
   static bool ShouldGenerateLog(Expression* type);
@@ skipping 34 matching lines @@
                           Register temp1,
                           Register temp2);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MathExpGenerator);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_X64_CODEGEN_X64_H_