optimization issue about -O2 and -Os

[llewelly@xmission.com]

Phil Edwards <phil@codesourcery.com> writes:

> On Fri, Apr 30, 2004 at 06:21:26PM +0100, Dave Korn wrote:
> > 
> >   Hmm, maybe it would be worthwhile to invent -f options for all these
> > ad-hoc tests on the optimize variables, so that the -O options then *did*
> > become shorthand for flag sets, and the suggestion I already made for
> > localising the failure with a given -O setting would actually work?
> 
> We need fewer -f options, really, not more of them.
> 
> Or to put it another way:  if an optimization pass is buggy, it doesn't
> deserve to have an -f option yet.
[snip]

>From the standpoint of a user, if an optimization pass is buggy, it
    needs an -fno option.