Make one extra BB to prevent PHI argument clash (PR

	PR gcov-profile/78582
	* gcc.dg/pr78582.c: New test.
	PR gcov-profile/78582
	* tree-profile.c (gimple_gen_time_profiler): Make one extra BB
	to prevent PHI argument clash.

From-SVN: r242958

gcc/ChangeLog

+2016-11-29  Martin Liska  <mliska@suse.cz>
+
+	PR gcov-profile/78582
+	* tree-profile.c (gimple_gen_time_profiler): Make one extra BB
+	to prevent PHI argument clash.
+
 2016-11-29  Claudiu Zissulescu  <claziss@synopsys.com>
 
 	* config/arc/arc.opt (marclinux): Fix typo.

gcc/testsuite/ChangeLog

+2016-11-29  Martin Liska  <mliska@suse.cz>
+
+	PR gcov-profile/78582
+	* gcc.dg/pr78582.c: New test.
+
 2016-11-29  Senthil Kumar Selvaraj  <senthil_kumar.selvaraj@atmel.com>
 
 	* testsuite/gcc.dg/pr31096-1.c: Use __{U,}INT32_TYPE__ for

gcc/tree-profile.c

@@ -461,10 +461,10 @@ void
 gimple_gen_time_profiler (unsigned tag, unsigned base)
 {
   tree type = get_gcov_type ();
-  basic_block cond_bb
-    = split_edge (single_succ_edge (ENTRY_BLOCK_PTR_FOR_FN (cfun)));
-
+  basic_block entry = ENTRY_BLOCK_PTR_FOR_FN (cfun);
+  basic_block cond_bb = split_edge (single_succ_edge (entry));
   basic_block update_bb = split_edge (single_succ_edge (cond_bb));
+  split_edge (single_succ_edge (update_bb));
 
   edge true_edge = single_succ_edge (cond_bb);
   true_edge->flags = EDGE_TRUE_VALUE;