@@ -5250,6 +5250,21 @@ set_autoinc_for_original_candidates (struct ivopts_data *data)
}
}
+/* Relate compare use with all candidates. */
+
+static void
+relate_compare_use_with_all_cands (struct ivopts_data *data)
+{
+ unsigned i, max_id = data->vcands.length () - 1;
+ for (i = 0; i < data->vgroups.length (); i++)
+ {
+ struct iv_group *group = data->vgroups[i];
+
+ if (group->type == USE_COMPARE)
+ bitmap_set_range (group->related_cands, 0, max_id);
+ }
+}
+
/* Finds the candidates for the induction variables. */
static void
@@ -5269,6 +5284,10 @@ find_iv_candidates (struct ivopts_data *data)
/* Record the important candidates. */
record_important_candidates (data);
+ /* Relate compare iv_use with all candidates. */
+ if (!data->consider_all_candidates)
+ relate_compare_use_with_all_cands (data);
+
if (dump_file && (dump_flags & TDF_DETAILS))
{
unsigned i;
Hi, For compare type iv_use, we want to relate it with all candidates in order to achieve smaller candidate set. Generally this doesn't hurt compilation time because compare iv_use is already related with most candidates and the number of compare iv_uses is also small. Is it OK? Thanks, bin 2017-04-11 Bin Cheng <bin.cheng@arm.com> * tree-ssa-loop-ivopts.c (relate_compare_use_with_all_cands): New. (find_iv_candidates): Call relate_compare_use_with_all_cands. From 05d21bf9421fb312a3470eb232bf98cd16d072a6 Mon Sep 17 00:00:00 2001 From: Bin Cheng <binche01@e108451-lin.cambridge.arm.com> Date: Thu, 6 Apr 2017 10:09:18 +0100 Subject: [PATCH 18/33] relate-comp_use-with-all-cands-20170312.txt --- gcc/tree-ssa-loop-ivopts.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+)