On Wed, Oct 21, 2020 at 03:29:11PM -0500, Segher Boessenkool wrote:
> Anyway:
>
> + || (outer_code == AND
> + && rs6000_is_valid_2insn_and (x, mode)))
> {
> *total = COSTS_N_INSNS (1);
> return true;
>
> It should return COSTS_N_INSNS (2) for that?
No, it should not!
/* (reg) is costed at zero by rtlanal.c:rtx_cost. That sets a
baseline for rtx costs: If a constant is valid in an insn,
it is free. */
--
Alan Modra
Australia Development Lab, IBM
