Re: Calculating elements addresses from arrays once

[Gruik <gruikmusic at ifrance dot com>]

> He means use the "-O1" or "-O2" optimisation options like:
>
>  gcc -O1 foobar.c
>
> or
>
>  gcc -O2 foobar.c
>
> As for your original question, if you're a bit familiar
> with assembly language you can readily check how well
> GCC is able to optimise your code by looking at the
> assembly output like so:
>
>  gcc -O2 -S foobar.c
>
> This would create a file named "foobar.s" which by
> default uses the AT&T assembler syntax - use "-masm=intel"
> (on x86 boxes) to use the more popular Intel assembler
> syntax, like so:
>
>  gcc -O2 -S -masm=intel foobar.c
>
> Hope this helps,
> Ranjit.
>
>  
Oh okay, (i had read "Zero" instead of "O")
Thanks

And what's the drawback of using -O2 option? Only a longer compilation time?

Well i'm not really familiar with asm..

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