Re: [Chicken-hackers] -O3 and -unboxing

[Felix]

From: Mario Domenech Goulart <address@hidden>
Subject: [Chicken-hackers] -O3 and -unboxing
Date: Mon, 04 Jul 2011 18:05:26 -0400

> Hi,
> 
> The docs (http://wiki.call-cc.org/man/4/Using%20the%20compiler) state
> that:
> 
>  -optimize-level 3 is equivalent to 
>  -optimize-leaf-routines -local -inline -inline-global -unboxing
> 
> And that
> 
> -unboxing
>     try to use unboxed temporaries for numerical operations. This
>     optimization is only effective in unsafe mode.
> 
> 
> Since -O3 doesn't use -unsafe and -unboxing is only effective in unsafe
> mode, is there any reason for adding -unboxing to level 3?

It is there to enable unboxing if the user compiles in unsafe mode. Since
this may be declared with "(declare (not safe))", I found it convenient to
enable it anyway at this optimization level.


cheers,
felix