re PR middle-end/57499 (ICE when noreturn destructor returns after throw with -O)

	PR middle-end/57499
	* tree-eh.c (cleanup_empty_eh): Bail out on totally empty
	bb with no successors.

	* g++.dg/torture/pr57499.C: New test.

From-SVN: r207504

gcc/ChangeLog

+2014-02-05  Jakub Jelinek  <jakub@redhat.com>
+
+	PR middle-end/57499
+	* tree-eh.c (cleanup_empty_eh): Bail out on totally empty
+	bb with no successors.
+
 2014-02-05  James Greenhalgh  <james.greenhalgh@arm.com>
 
 	PR target/59718

gcc/testsuite/ChangeLog

+2014-02-05  Jakub Jelinek  <jakub@redhat.com>
+
+	PR middle-end/57499
+	* g++.dg/torture/pr57499.C: New test.
+
 2014-02-05  Yury Gribov  <y.gribov@samsung.com>
 
-	* gcc.dg/asan/nosanitize-and-inline.c: : New test.
+	* gcc.dg/asan/nosanitize-and-inline.c: New test.
 
 2014-02-04  Jan Hubicka  <hubicka@ucw.cz>
 

gcc/testsuite/g++.dg/torture/pr57499.C

+// PR middle-end/57499
+// { dg-do compile }
+
+struct S
+{
+  ~S () __attribute__ ((noreturn)) {} // { dg-warning "function does return" }
+};
+
+void
+foo ()
+{
+  S s;
+  throw 1;
+}

gcc/tree-eh.c

@@ -4396,8 +4396,11 @@ cleanup_empty_eh (eh_landing_pad lp)
   /* If the block is totally empty, look for more unsplitting cases.  */
   if (gsi_end_p (gsi))
     {
-      /* For the degenerate case of an infinite loop bail out.  */
-      if (infinite_empty_loop_p (e_out))
+      /* For the degenerate case of an infinite loop bail out.
+	 If bb has no successors and is totally empty, which can happen e.g.
+	 because of incorrect noreturn attribute, bail out too.  */
+      if (e_out == NULL
+	  || infinite_empty_loop_p (e_out))
 	return ret;
 
       return ret | cleanup_empty_eh_unsplit (bb, e_out, lp);