https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112450
--- Comment #2 from JuzheZhong <juzhe.zhong at rivai dot ai> ---
if (loop_vinfo
&& LOOP_VINFO_CAN_USE_PARTIAL_VECTORS_P (loop_vinfo)
&& mask_out_inactive)
{
if (cond_len_fn != IFN_LAST
&& direct_internal_fn_supported_p (cond_len_fn, vectype,
OPTIMIZE_FOR_SPEED))
vect_record_loop_len (loop_vinfo, lens, ncopies * vec_num, vectype,
1);
else if (cond_fn != IFN_LAST
&& direct_internal_fn_supported_p (cond_fn, vectype,
OPTIMIZE_FOR_SPEED))
vect_record_loop_mask (loop_vinfo, masks, ncopies * vec_num,
vectype, NULL);
else
{
if (dump_enabled_p ())
dump_printf_loc (MSG_MISSED_OPTIMIZATION, vect_location,
"can't use a fully-masked loop because no"
" conditional operation is available.\n");
LOOP_VINFO_CAN_USE_PARTIAL_VECTORS_P (loop_vinfo) = false;
}
}
go through second condition with
vect_record_loop_mask here.
Seems that we can't differentiate RVV VLS mode with cond_xxx.
RVV VLS mode just want to support COND_XXX to support
for (int i < N)
cond[i]? a[i] + b[i] : c[i]
N is known iterations.
