re PR c++/69797 (ICE on invalid code on x86_64-linux-gnu in operator[], at vec.h:714)

	PR c++/69797
	* c-common.c (sync_resolve_size): Diagnose too few arguments
	even when params is non-NULL empty vector.

	* c-c++-common/pr69797.c: New test.

From-SVN: r233434

gcc/c-family/ChangeLog

+2016-02-15  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/69797
+	* c-common.c (sync_resolve_size): Diagnose too few arguments
+	even when params is non-NULL empty vector.
+
 2016-02-08  Bernd Schmidt  <bschmidt@redhat.com>
 
 	PR target/60410

gcc/c-family/c-common.c

@@ -10675,7 +10675,7 @@ sync_resolve_size (tree function, vec<tree, va_gc> *params, bool fetch)
   tree type;
   int size;
 
-  if (!params)
+  if (vec_safe_is_empty (params))
     {
       error ("too few arguments to function %qE", function);
       return 0;

gcc/testsuite/ChangeLog

+2016-02-15  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/69797
+	* c-c++-common/pr69797.c: New test.
+
 2016-02-15  Prathamesh Kulkarni  <prathamesh.kulkarni@linaro.org>
 
 	* lib/target-supports.exp (check_effective_target_section_anchors): Add

gcc/testsuite/c-c++-common/pr69797.c

+/* PR c++/69797 */
+/* { dg-do compile } */
+
+void
+foo () 
+{
+  __atomic_fetch_add ();	/* { dg-error "too few arguments to function" } */
+}