On 01/07/2013 02:16 AM, Tom de Vries wrote:
> - /* If MODE is no wider than a single word, we return a paradoxical
> - SUBREG. */
> + /* If MODE is no wider than a single word, we return a
> + lowpart or paradoxical SUBREG. */
> if (GET_MODE_SIZE (mode) <= UNITS_PER_WORD)
> - return gen_rtx_SUBREG (mode, force_reg (GET_MODE (op), op), 0);
> + {
> + if (GET_MODE_SIZE (mode) < GET_MODE_SIZE (GET_MODE (op)))
> + return gen_lowpart_SUBREG (mode, op);
> + else
> + return gen_rtx_SUBREG (mode, force_reg (GET_MODE (op), op), 0);
> + }
Is there any good reason we're using gen_rtx_SUBREG directly here?
Seems like this sort of logic would be present in plain gen_lowpart,
generating the paradoxical subreg that we want.
r~
