Create an extra BB in profile-generate (PR tree-optimization/81041).

2017-06-12  Martin Liska  <mliska@suse.cz>

	PR tree-optimization/81041
	* tree-profile.c (gimple_gen_ic_func_profiler):
	Create an extra BB in profile-generate
	(gimple_gen_time_profiler): Likewise.

From-SVN: r249120

gcc/ChangeLog

+2017-06-12  Martin Liska  <mliska@suse.cz>
+
+	PR tree-optimization/81041
+	* tree-profile.c (gimple_gen_ic_func_profiler):
+	Create an extra BB in profile-generate
+	(gimple_gen_time_profiler): Likewise.
+
 2017-06-12  Jakub Jelinek  <jakub@redhat.com>
 
 	PR tree-optimization/81003

gcc/tree-profile.c

@@ -429,6 +429,10 @@ gimple_gen_ic_func_profiler (void)
   basic_block cond_bb = split_edge (single_succ_edge (entry));
   basic_block update_bb = split_edge (single_succ_edge (cond_bb));
 
+  /* We need to do an extra split in order to not create an input
+     for a possible PHI node.  */
+  split_edge (single_succ_edge (update_bb));
+
   edge true_edge = single_succ_edge (cond_bb);
   true_edge->flags = EDGE_TRUE_VALUE;
 
@@ -487,6 +491,10 @@ gimple_gen_time_profiler (unsigned tag, unsigned base)
   basic_block cond_bb = split_edge (single_succ_edge (entry));
   basic_block update_bb = split_edge (single_succ_edge (cond_bb));
 
+  /* We need to do an extra split in order to not create an input
+     for a possible PHI node.  */
+  split_edge (single_succ_edge (update_bb));
+
   edge true_edge = single_succ_edge (cond_bb);
   true_edge->flags = EDGE_TRUE_VALUE;
   true_edge->probability = PROB_UNLIKELY;