diff options
Diffstat (limited to 'gcc/tree-vect-loop.c')
| -rw-r--r-- | gcc/tree-vect-loop.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/gcc/tree-vect-loop.c b/gcc/tree-vect-loop.c index 48a54b0..1e21fe6 100644 --- a/gcc/tree-vect-loop.c +++ b/gcc/tree-vect-loop.c @@ -2772,7 +2772,15 @@ vect_better_loop_vinfo_p (loop_vec_info new_loop_vinfo, /* Limit the VFs to what is likely to be the maximum number of iterations, to handle cases in which at least one loop_vinfo is fully-masked. */ - HOST_WIDE_INT estimated_max_niter = likely_max_stmt_executions_int (loop); + HOST_WIDE_INT estimated_max_niter; + loop_vec_info main_loop = LOOP_VINFO_ORIG_LOOP_INFO (old_loop_vinfo); + unsigned HOST_WIDE_INT main_vf; + if (main_loop + && LOOP_VINFO_NITERS_KNOWN_P (main_loop) + && LOOP_VINFO_VECT_FACTOR (main_loop).is_constant (&main_vf)) + estimated_max_niter = LOOP_VINFO_INT_NITERS (main_loop) % main_vf; + else + estimated_max_niter = likely_max_stmt_executions_int (loop); if (estimated_max_niter != -1) { if (known_le (estimated_max_niter, new_vf)) |