This is the mail archive of the
gcc@gcc.gnu.org
mailing list for the GCC project.
RE: GCC -On optimization passes: flag and doc issues
> -----Original Message-----
> From: Ian Lance Taylor [mailto:iant@google.com]
> Sent: Tuesday, April 17, 2007 4:20 PM
> To: Eric Weddington
> Cc: 'Steven Bosscher'; gcc@gcc.gnu.org; 'Joerg Wunsch';
> 'Anatoly Sokolov'
> Subject: Re: GCC -On optimization passes: flag and doc issues
>
> Eric Weddington <eweddington@cso.atmel.com> writes:
>
> > "Also, as you mention the target code has a chance to tune
> this ..., can you
> > give me a hint about
> > where to look for these knobs? I might give it a try to
> see whether I
> > can find a more optimal set of parameters."
> >
> > This was in response to your comment in #4. Do you have any concrete
> > suggestions?
>
> Define OPTIMIZATION_OPTIONS in the CPU.h file. See the internal
> documentation, and examples in many backends.
Thanks for your help. We'll look into it.
> If the code size increases for AVR, when using -Os, when comparing an
> older release to mainline or 4.2 branch, you should report that as a
> regression in bugzilla. Thanks.
Will change the bug report to reflect that.
Eric