diff options
| author | Jan Hubicka <hubicka@ucw.cz> | 2016-05-20 12:59:08 +0000 |
|---|---|---|
| committer | Jan Hubicka <hubicka@ucw.cz> | 2016-05-20 12:59:08 +0000 |
| commit | 97098aea92059c56e5c00fc4f060de7f86885792 (patch) | |
| tree | 68f6b8fbb27234c91e8d52822750ef532246bd69 | |
| parent | d227595682396630ff3c2a89a06176bbcc9718f0 (diff) | |
* loop-doloop.c (doloop_optimize): Use get_estimated_loop_iterations_int
and get_max_loop_iterations_int.
git-svn-id: https://gcc.gnu.org/svn/gcc/trunk@236509 138bc75d-0d04-0410-961f-82ee72b054a4
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/loop-doloop.c | 20 |
2 files changed, 13 insertions, 12 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 1d5bca7131b..021f64e5bd8 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,10 @@ 2016-05-20 Jan Hubicka <hubicka@ucw.cz> + * loop-doloop.c (doloop_optimize): Use get_estimated_loop_iterations_int + and get_max_loop_iterations_int. + +2016-05-20 Jan Hubicka <hubicka@ucw.cz> + * tree-ssa-loop-niter.c (idx_infer_loop_bounds): We can not produce realistic upper bounds here. 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; } |