Re: GCC 3.3.1 -O2 problem with sqrt.c

[Sanjiv Kumar Gupta <sanjiv dot gupta at oracle dot com>]

. I don't know whether gcc mail server
> accepts attachments or not,
Oh. It does.

> --- Ian Lance Taylor <ian@airs.com> wrote:
>
>
> > Sanjiv Kumar Gupta <skgnu@yahoo.com> writes:
> >
> >
> > > I am using gcc 3.3.1 release as my port, and looks
> > > like I have hit a problem with greg.
> >
> > You neglected to mention what target you are using.
> >
> >
> > > I couldn't understand why the insns 620 and 621
> >
> > are
> >
> > > being generated here as DI moves.
> >
> > I'm not sure specifically why it got a DI move here,
> > but it doesn't
> > look wrong.  It's treating the struct named parts as
> > DImode.
> >
> >
> > > This is creating problem since insn 621 gets
> >
> > splitted
> >
> > > after reload into two SI moves,i.e. @(r21, -8) and
> > > @(r21, -4).
> > > This renders insns 619 as dead and hence insns 618
> >
> > and
> >
> > > insn 429 as dead, which are eliminated by flow2.
> >
> > It does look rather suspicious, but it's hard to
> > know whether it is
> > wrong without seeing the value in r1.
> >
> > Does the behaviour change if you use
> > -fno-strict-aliasing?  (I can't
> > remember what the default was in 3.3.1).
> >
> > Ian
>
>
>
> 		
> __________________________________ 
> Yahoo! Mail 
> Stay connected, organized, and protected. Take the tour: 
> http://tour.mail.yahoo.com/mailtour.html