[PATCH] Fix PR c/11420 (broken amd64 movabs*) (take 2)

[Richard Henderson]

On Mon, Jul 07, 2003 at 04:18:23PM +0200, Jakub Jelinek wrote:
> +  mem = SET_SRC (set);
> +  while (GET_CODE (mem) == SUBREG)
> +    mem = SUBREG_REG (mem);
> +  if (GET_CODE (mem) != MEM || XEXP (mem, 0) != op)
> +    {
> +      mem = SET_DEST (set);
> +      while (GET_CODE (mem) == SUBREG)
> +	mem = SUBREG_REG (mem);
> +      if (GET_CODE (mem) != MEM || XEXP (mem, 0) != op)
> +	abort ();

What is the logic behind doing it this way with op an rtx
instead of passing in an operand number and doing

  mem = XEXP (set, opnum);
  if (GET_CODE (mem) != MEM)
    abort ();

and so forth?



r~