https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127736
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|tree-optimization |target
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Classifying this as target issue - the
/* Use the cost model only if it is more conservative than user specified
threshold. */
unsigned int th = (unsigned) MAX (min_scalar_loop_bound,
min_profitable_iters);
LOOP_VINFO_COST_MODEL_THRESHOLD (loop_vinfo) = th;
if (LOOP_VINFO_NITERS_KNOWN_P (loop_vinfo)
&& LOOP_VINFO_INT_NITERS (loop_vinfo) < th)
{
if (dump_enabled_p ())
dump_printf_loc (MSG_MISSED_OPTIMIZATION, vect_location,
"not vectorized: vectorization not profitable.\n");
if (dump_enabled_p ())
dump_printf_loc (MSG_NOTE, vect_location,
"not vectorized: iteration count smaller than user "
"specified loop bound parameter or minimum profitable
"
"iterations (whichever is more conservative).\n");
return 0;
}
check should disqualify the loop as not profitable to vectorize. Meaning
that 'th' is "wrong", aka costing is off.
