re PR middle-end/81659 (ICE in verify_dominators, at dominance.c:1184)

2017-10-27  Richard Biener  <rguenther@suse.de>

	PR middle-end/81659
	* tree-eh.c (pass_lower_eh_dispatch::execute): Free dominator
	info when we redirected EH.

	* g++.dg/torture/pr81659.C: New testcase.

From-SVN: r254136

gcc/ChangeLog

+2017-10-27  Richard Biener  <rguenther@suse.de>
+
+	PR middle-end/81659
+	* tree-eh.c (pass_lower_eh_dispatch::execute): Free dominator
+	info when we redirected EH.
+
 2017-10-26  Michael Collison  <michael.collison@arm.com>
 
 	* config/aarch64/aarch64.md(<optab>_trunc><vf><GPI:mode>2):

gcc/testsuite/ChangeLog

+2017-10-27  Richard Biener  <rguenther@suse.de>
+
+	PR middle-end/81659
+	* g++.dg/torture/pr81659.C: New testcase.
+
 2017-10-26  Michael Collison  <michael.collison@arm.com>
 
 	* gcc.target/aarch64/fix_trunc1.c: New testcase.

gcc/testsuite/g++.dg/torture/pr81659.C

+// { dg-do compile }
+
+void
+a (int b)
+{
+  if (b)
+    throw;
+  try
+    {
+      a (3);
+    }
+  catch (int)
+    {
+    }
+  catch (int)
+    {
+    }
+}
+

gcc/tree-eh.c

@@ -3779,7 +3779,10 @@ pass_lower_eh_dispatch::execute (function *fun)
     }
 
   if (redirected)
-    delete_unreachable_blocks ();
+    {
+      free_dominance_info (CDI_DOMINATORS);
+      delete_unreachable_blocks ();
+    }
   return flags;
 }