Re: Apple's -fast option for gcc

[Mike Stump <mrs at apple dot com>]

On Tuesday, September 16, 2003, at 12:34 PM, Gabriel Dos Reis wrote:
> | -fstrict-aliasing
> | -frelax-aliasing
>
> what are the relations between the two, and -fno-strict-aliasing?

Incestuous.  strict is at one end of a continuum, no-strict is at the 
other.  And in-between, where bad code and benchmark code lies, is 
where relaxed fits in.  It is the mind reader that knows what they 
meant, and does the right think anyway, even though the code is wrong.

If you want a better answer, you should be able to grab gcc from the 
apple cvs server and grep relax | grep -i 'apple local' and get hits on 
all the relevant code.  Roughly, think about field offsets and 
structures types...


Oh course, I could have it totally wrong, I didn't write the code!