re PR target/81621 (ICE in delete_insn, at cfgrtl.c:167 with s390x cross compiler)

	PR target/81621
	* bb-reorder.c (pass_partition_blocks::execute): Return TODO_df_finish
	after setting changeable df flags.

	* gcc.dg/pr81621.c: New test.

From-SVN: r250857

gcc/ChangeLog

+2017-08-03  Jakub Jelinek  <jakub@redhat.com>
+
+	PR target/81621
+	* bb-reorder.c (pass_partition_blocks::execute): Return TODO_df_finish
+	after setting changeable df flags.
+
 2017-08-03  Richard Biener  <rguenther@suse.de>
 
 	* tree-ssa-reassoc.c (should_break_up_subtract): Also break
 	up if the use is in USE - X.
 
-2017-08-03 Alexander Monakov  <amonakov@ispras.ru>
+2017-08-03  Alexander Monakov  <amonakov@ispras.ru>
 
 	* toplev.c (dumpfile.h): New include.
 	(internal_error_reentered): New static function.  Use it...
 	(internal_error_function): ...here to handle reentered internal_error.
 
-2017-08-03 Richard Biener  <rguenther@suse.de>
+2017-08-03  Richard Biener  <rguenther@suse.de>
 
 	PR middle-end/81148
 	* fold-const.c (split_tree): Add minus_var and minus_con

gcc/bb-reorder.c

@@ -2904,7 +2904,8 @@ pass_partition_blocks::execute (function *fun)
 
   crossing_edges = find_rarely_executed_basic_blocks_and_crossing_edges ();
   if (!crossing_edges.exists ())
-    return 0;
+    /* Make sure to process deferred rescans and clear changeable df flags.  */
+    return TODO_df_finish;
 
   crtl->has_bb_partition = true;
 
@@ -2970,7 +2971,8 @@ pass_partition_blocks::execute (function *fun)
       df_analyze ();
     }
 
-  return 0;
+  /* Make sure to process deferred rescans and clear changeable df flags.  */
+  return TODO_df_finish;
 }
 
 } // anon namespace

gcc/testsuite/ChangeLog

+2017-08-03  Jakub Jelinek  <jakub@redhat.com>
+
+	PR target/81621
+	* gcc.dg/pr81621.c: New test.
+
 2017-08-03  Richard Biener  <rguenther@suse.de>
 
 	* gcc.dg/tree-ssa/reassoc-23.c: Adjust to fool early folding
 	and CSE.
 
-2017-08-03 Richard Biener  <rguenther@suse.de>
+2017-08-03  Richard Biener  <rguenther@suse.de>
 
 	PR middle-end/81148
 	* c-c++-common/ubsan/pr81148.c: New testcase.

gcc/testsuite/gcc.dg/pr81621.c

+/* PR target/81621 */
+/* { dg-do compile { target freorder } } */
+/* { dg-options "-Og -fno-split-wide-types -freorder-blocks-and-partition" } */
+
+#include "graphite/scop-10.c"