re PR sanitizer/80444 (-fcompare-debug failures with -fsanitize-coverage=trace-pc)

	PR sanitizer/80444
	* sancov.c (sancov_pass): Use gsi_start_nondebug_after_labels_bb
	instead of gsi_after_labels.

	* gcc.dg/sancov/pr80444.c: New test.

From-SVN: r246971

gcc/ChangeLog

+2017-04-18  Jakub Jelinek  <jakub@redhat.com>
+
+	PR sanitizer/80444
+	* sancov.c (sancov_pass): Use gsi_start_nondebug_after_labels_bb
+	instead of gsi_after_labels.
+
 2017-04-18  Jeff Law  <law@redhat.com>
 
 	* regcprop.c (maybe_mode_change): Avoid creating copies of the

gcc/sancov.c

@@ -46,7 +46,7 @@ sancov_pass (function *fun)
   basic_block bb;
   FOR_EACH_BB_FN (bb, fun)
     {
-      gimple_stmt_iterator gsi = gsi_after_labels (bb);
+      gimple_stmt_iterator gsi = gsi_start_nondebug_after_labels_bb (bb);
       if (gsi_end_p (gsi))
 	continue;
       gimple *stmt = gsi_stmt (gsi);

gcc/testsuite/ChangeLog

 2017-04-18  Jakub Jelinek  <jakub@redhat.com>
 
+	PR sanitizer/80444
+	* gcc.dg/sancov/pr80444.c: New test.
+
 	PR middle-end/79788
 	PR middle-end/80375
 	* gcc.dg/pr79788-1.c: New test.

gcc/testsuite/gcc.dg/sancov/pr80444.c

+/* PR sanitizer/80444 */
+/* { dg-do compile } */
+/* { dg-options "-fsanitize-coverage=trace-pc -fcompare-debug" } */
+
+void
+foo (void)
+{
+  int a = 0;
+}