From 216e83748d52d0bb056dd6b46ea74a14b08c7639 Mon Sep 17 00:00:00 2001 From: Jan Hubicka Date: Fri, 20 May 2016 14:59:08 +0200 Subject: [PATCH] loop-doloop.c (doloop_optimize): Use get_estimated_loop_iterations_int and get_max_loop_iterations_int. * loop-doloop.c (doloop_optimize): Use get_estimated_loop_iterations_int and get_max_loop_iterations_int. From-SVN: r236509 --- gcc/ChangeLog | 5 +++++ 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 @@ -1,3 +1,8 @@ +2016-05-20 Jan Hubicka + + * loop-doloop.c (doloop_optimize): Use get_estimated_loop_iterations_int + and get_max_loop_iterations_int. + 2016-05-20 Jan Hubicka * tree-ssa-loop-niter.c (idx_infer_loop_bounds): We can not produce 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; } -- 2.30.2