Re: Disable sibcalls for all targets

[Andrew Pinski <pinskia at physics dot uc dot edu>]

On Monday, May 19, 2003, at 11:32 US/Eastern, Andrew Haley wrote:

> Andrew Pinski writes:
> > sibcall optimization usually speeds up many programs and makes them
> > smaller (in fact on ppc, if there is only one call at the end, it
> > does not have to save the link register at all, so it can speed up
> > considerably on the 750/7400/7500 series because they mflr and mtlr
> > and serializing instructions because lr is not renamed).
> >
> > In fact I think Java is faulty if depends on what is in the
> > backtrace but that is a different argument.
>
> How is that a different argument?  We have to disallow all
> optimizations that don't conform to the language specification.
> That's the same for C and Java and any other language.

No I was trying to say that is Java was written wrong in first place.
Not that the patch is not needed.

What about this, if it is gnu.* and java.* disable sibcall optimizations
(that need it, if all need it then do that) in libjava,
and write in the documentation about this bug (feature).


Thanks,
Andrew Pinski



> Andrew.