Register window support in DWARF-2

[Richard Henderson]

On Thu, Nov 25, 2004 at 01:18:09PM +0100, Eric Botcazou wrote:
> +  /* This target hook allows the backend to emit frame-related insns that
> +     contain UNSPECs or UNSPEC_VOLATILEs.  The call frame debugging info
> +     engine will invoke it on insns of the form
> +       (set (reg) (unspec [...] UNSPEC_INDEX))
> +     and
> +       (set (reg) (unspec_volatile [...] UNSPECV_INDEX))
> +     to let the backend emit the call frame instructions.  */
> +  void (* dwarf_handle_frame_unspec) (const char *);

I think that you should pass the instruction pattern as well.  
Otherwise you can't distinguish which unspec.


r~