Fix emission of exception dispatch (PR middle-end/82154).

2017-09-13  Martin Liska  <mliska@suse.cz>

	PR middle-end/82154
	* stmt.c (expand_sjlj_dispatch_table): Use CASE_LOW when
	CASE_HIGH is NULL_TREE.
2017-09-13  Martin Liska  <mliska@suse.cz>

	PR middle-end/82154
	* g++.dg/torture/pr82154.C: New test.

From-SVN: r252728

gcc/ChangeLog

+2017-09-13  Martin Liska  <mliska@suse.cz>
+
+	PR middle-end/82154
+	* stmt.c (expand_sjlj_dispatch_table): Use CASE_LOW when
+	CASE_HIGH is NULL_TREE.
+
 2017-09-13  Richard Sandiford  <richard.sandiford@linaro.org>
 	    Alan Hayward  <alan.hayward@arm.com>
 	    David Sherwood  <david.sherwood@arm.com>

gcc/stmt.c

@@ -1063,8 +1063,10 @@ expand_sjlj_dispatch_table (rtx dispatch_index,
       for (int i = ncases - 1; i >= 0; --i)
 	{
 	  tree elt = dispatch_table[i];
-	  case_list.safe_push (simple_case_node (CASE_LOW (elt),
-						 CASE_HIGH (elt),
+	  tree high = CASE_HIGH (elt);
+	  if (high == NULL_TREE)
+	    high = CASE_LOW (elt);
+	  case_list.safe_push (simple_case_node (CASE_LOW (elt), high,
 						 CASE_LABEL (elt)));
 	}
 

gcc/testsuite/ChangeLog

+2017-09-13  Martin Liska  <mliska@suse.cz>
+
+	PR middle-end/82154
+	* g++.dg/torture/pr82154.C: New test.
+
 2017-09-13  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	PR c++/61362

gcc/testsuite/g++.dg/torture/pr82154.C

+// { dg-do compile }
+// { dg-additional-options "-Wno-deprecated" }
+
+namespace a {
+int b;
+class c
+{
+};
+}
+class g
+{
+public:
+  g ();
+};
+using a::b;
+class d
+{
+public:
+  d ();
+  void e ();
+};
+class f
+{
+  d
+  i ()
+  {
+    static d j;
+  }
+  int *k () throw (a::c);
+};
+
+
+int *f::k () throw (a::c)
+{
+  static g h;
+  i ();
+  int l = 2;
+  while (l)
+    {
+      --l;
+      try
+	{
+	  operator new (b);
+	}
+      catch (a::c)
+	{
+	}
+    }
+  i ().e ();
+}