diff options
Diffstat (limited to 'gcc/loop-doloop.c')
| -rw-r--r-- | gcc/loop-doloop.c | 20 |
1 files changed, 8 insertions, 12 deletions
diff --git a/gcc/loop-doloop.c b/gcc/loop-doloop.c index 940c966dc5a..6996c0bc0ef 100644 --- a/gcc/loop-doloop.c +++ b/gcc/loop-doloop.c @@ -610,7 +610,8 @@ doloop_optimize (struct loop *loop) widest_int iterations, iterations_max; rtx_code_label *start_label; rtx condition; - unsigned level, est_niter; + unsigned level; + HOST_WIDE_INT est_niter; int max_cost; struct niter_desc *desc; unsigned word_mode_size; @@ -635,21 +636,16 @@ doloop_optimize (struct loop *loop) } mode = desc->mode; - est_niter = 3; - if (desc->const_iter) - est_niter = desc->niter; - /* If the estimate on number of iterations is reliable (comes from profile - feedback), use it. Do not use it normally, since the expected number - of iterations of an unrolled loop is 2. */ - if (loop->header->count) - est_niter = expected_loop_iterations (loop); - - if (est_niter < 3) + est_niter = get_estimated_loop_iterations_int (loop); + if (est_niter == -1) + est_niter = get_max_loop_iterations_int (loop); + + if (est_niter >= 0 && est_niter < 3) { if (dump_file) fprintf (dump_file, "Doloop: Too few iterations (%u) to be profitable.\n", - est_niter); + (unsigned int)est_niter); return false; } |