re PR c++/70641 (ICE on valid code at -O1 and above on x86_64-linux-gnu: verify_gimple failed)

	PR c++/70641
	* ipa-pure-const.c (pass_nothrow::execute): Call maybe_clean_eh_stmt
	on all recursive call stmts.  Return TODO_cleanup_cfg if any dead
	eh edges have been purged.

	* g++.dg/opt/pr70641.C: New test.

From-SVN: r234962

gcc/ChangeLog

 2016-04-13  Jakub Jelinek  <jakub@redhat.com>
 
+	PR c++/70641
+	* ipa-pure-const.c (pass_nothrow::execute): Call maybe_clean_eh_stmt
+	on all recursive call stmts.  Return TODO_cleanup_cfg if any dead
+	eh edges have been purged.
+
 	PR c++/70594
 	* tree-sra.c (create_access_replacement,
 	get_replaced_param_substitute): Set DECL_NAMELESS on repl if it

gcc/ipa-pure-const.c

@@ -1956,10 +1956,25 @@ pass_nothrow::execute (function *)
     }
 
   node->set_nothrow_flag (true);
+
+  bool cfg_changed = false;
+  if (self_recursive_p (node))
+    FOR_EACH_BB_FN (this_block, cfun)
+      if (gimple *g = last_stmt (this_block))
+	if (is_gimple_call (g))
+	  {
+	    tree callee_t = gimple_call_fndecl (g);
+	    if (callee_t
+		&& recursive_call_p (current_function_decl, callee_t)
+		&& maybe_clean_eh_stmt (g)
+		&& gimple_purge_dead_eh_edges (this_block))
+	      cfg_changed = true;
+	  }
+
   if (dump_file)
     fprintf (dump_file, "Function found to be nothrow: %s\n",
 	     current_function_name ());
-  return 0;
+  return cfg_changed ? TODO_cleanup_cfg : 0;
 }
 
 } // anon namespace

gcc/testsuite/ChangeLog

+2016-04-13  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/70641
+	* g++.dg/opt/pr70641.C: New test.
+
 2016-04-13  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
 
 	PR rtl-optimization/68749

gcc/testsuite/g++.dg/opt/pr70641.C

+// PR c++/70641
+// { dg-do compile }
+// { dg-options "-O2" }
+
+void
+foo ()
+{
+  try { foo (); }
+  catch (...) { __builtin_abort (); }
+}