On Tue, Nov 16, 2010 at 10:22:00PM -0500, Joern Rennecke wrote:
> Quoting Nathan Froyd <froy...@codesourcery.com>:
> >I am admittedly a C++ newbie; the first thing I thought of was:
> >
> >class gcc::cumulative_args {
> > virtual void advance (...) = 0;
> > virtual rtx arg (...) = 0;
> > virtual rtx incoming_arg (...) { return this->arg (...); };
> > virtual int arg_partial_bytes (...) = 0;
> > // ...and so on for many of the hooks that take CUMULATIVE_ARGS *
> > // possibly with default implementations instead of pure virtual
> > // functions.
> >};
>
> Trying to put a target-derived object of that into struct rtl_data would
> be nonsentical. You might store a pointer, of course.
Yes, of course. I thought that might have been clear from context.
> Does that mean you acknowledge that we shouldn't have CUMULATIVE_ARGS
> taking hooks in the global target vector?
Maybe? I think the methods discussed in this thread would be better for
when we do move to C++. I don't think your original proposal or
anything that sacrifices the type-safety of the current interface is the
way forward.
-Nathan
