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.
But at any rate, the member function implementations would not be part
of the globally-visible target vector. They are in a smaller vector, and
only the pieces of the middle end that deal with argument passing get to
see them.
Does that mean you acknowledge that we shouldn't have CUMULATIVE_ARGS
taking hooks in the global target vector?
