Register window support in DWARF-2

[Richard Henderson]

On Wed, Nov 24, 2004 at 12:26:11AM +0100, Eric Botcazou wrote:
> What about adding a new rule to handle UNSPEC_VOLATILEs with the 
> help of a new target hook?  Something like:
> 
>   Rule 15:
>   (set <reg> {unspec, unspec_volatile})
>   effects: target-dependent

That, or a magic attribute, such that

#ifdef HAVE_ATTR_window_save
	if (RTX_FRAME_RELATED_P (insn)
	    && get_attr_window_save (insn))
	 ...
#endif


r~