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Diffstat (limited to 'gcc/tree-ssa-loop-prefetch.c')
| -rw-r--r-- | gcc/tree-ssa-loop-prefetch.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/gcc/tree-ssa-loop-prefetch.c b/gcc/tree-ssa-loop-prefetch.c index 53977d8..a0d70cc 100644 --- a/gcc/tree-ssa-loop-prefetch.c +++ b/gcc/tree-ssa-loop-prefetch.c @@ -968,7 +968,13 @@ loop_prefetch_arrays (struct loop *loop) the loop rolls at least AHEAD times, prefetching the references does not make sense. */ if (est_niter >= 0 && est_niter <= (HOST_WIDE_INT) ahead) - goto fail; + { + if (dump_file && (dump_flags & TDF_DETAILS)) + fprintf (dump_file, + "Not prefetching -- loop estimated to roll only %d times\n", + (int) est_niter); + goto fail; + } ninsns = tree_num_loop_insns (loop, &eni_size_weights); unroll_factor = determine_unroll_factor (loop, refs, ninsns, &desc, |