On Mon, Jan 29, 2018 at 03:01:10PM -0600, Aaron Sawdey wrote:
> /* If there is a DRAP register or a pseudo in internal_arg_pointer,
> rewrite the incoming location of parameters passed on the stack
> into MEMs based on the argument pointer, so that incoming doesn't
> depend on a pseudo. */
> if (MEM_P (incoming)
> && (XEXP (incoming, 0) == crtl->args.internal_arg_pointer
> || (GET_CODE (XEXP (incoming, 0)) == PLUS
> && XEXP (XEXP (incoming, 0), 0)
> == crtl->args.internal_arg_pointer
> && CONST_INT_P (XEXP (XEXP (incoming, 0), 1)))))
> {
> HOST_WIDE_INT off = -FIRST_PARM_OFFSET (current_function_decl);
> if (GET_CODE (XEXP (incoming, 0)) == PLUS)
> off += INTVAL (XEXP (XEXP (incoming, 0), 1));
> incoming
> = replace_equiv_address_nv (incoming,
> plus_constant (Pmode,
> arg_pointer_rtx, off));
> }
The code actually meant pointer comparison, the question is what is
different on powerpc* that you end up with a different REG.
>From what I can see, function.c uses crtl->args.internal_arg_pointer
directly rather than a REG with the same REGNO.
Where does it become something different and why?
Jakub
