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2011-11-04 Revital Eres <revital.eres@linaro.org>
Backport from mainline -r180673:
gcc/
* modulo-sched.c (generate_prolog_epilog): Mark prolog
and epilog as BB_DISABLE_SCHEDULE.
(mark_loop_unsched): New function.
(sms_schedule): Call it.
=== modified file 'gcc/modulo-sched.c'
--- old/gcc/modulo-sched.c 2011-10-10 14:35:32 +0000
+++ new/gcc/modulo-sched.c 2011-10-30 05:31:00 +0000
@@ -1173,6 +1173,8 @@
/* Put the prolog on the entry edge. */
e = loop_preheader_edge (loop);
split_edge_and_insert (e, get_insns ());
+ if (!flag_resched_modulo_sched)
+ e->dest->flags |= BB_DISABLE_SCHEDULE;
end_sequence ();
@@ -1186,9 +1188,24 @@
gcc_assert (single_exit (loop));
e = single_exit (loop);
split_edge_and_insert (e, get_insns ());
+ if (!flag_resched_modulo_sched)
+ e->dest->flags |= BB_DISABLE_SCHEDULE;
+
end_sequence ();
}
+/* Mark LOOP as software pipelined so the later
+ scheduling passes don't touch it. */
+static void
+mark_loop_unsched (struct loop *loop)
+{
+ unsigned i;
+ basic_block *bbs = get_loop_body (loop);
+
+ for (i = 0; i < loop->num_nodes; i++)
+ bbs[i]->flags |= BB_DISABLE_SCHEDULE;
+}
+
/* Return true if all the BBs of the loop are empty except the
loop header. */
static bool
@@ -1714,9 +1731,10 @@
permute_partial_schedule (ps, g->closing_branch->first_note);
/* Mark this loop as software pipelined so the later
- scheduling passes doesn't touch it. */
+ scheduling passes don't touch it. */
if (! flag_resched_modulo_sched)
- g->bb->flags |= BB_DISABLE_SCHEDULE;
+ mark_loop_unsched (loop);
+
/* The life-info is not valid any more. */
df_set_bb_dirty (g->bb);
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