Hi!
In C++, if there are no parameters, params can be non-NULL, but still
empty vector. Fixed by properly testing for empty vector.
Bootstrapped/regtested on x86_64-linux and i686-linux, ok for trunk?
2016-02-15 Jakub Jelinek <ja...@redhat.com>
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.
--- gcc/c-family/c-common.c.jj 2016-02-08 18:39:17.000000000 +0100
+++ gcc/c-family/c-common.c 2016-02-15 14:56:14.518790242 +0100
@@ -10675,7 +10675,7 @@ sync_resolve_size (tree function, vec<tr
tree type;
int size;
- if (!params)
+ if (vec_safe_is_empty (params))
{
error ("too few arguments to function %qE", function);
return 0;
--- gcc/testsuite/c-c++-common/pr69797.c.jj 2016-02-15 14:57:31.244745664
+0100
+++ gcc/testsuite/c-c++-common/pr69797.c 2016-02-15 14:57:11.000000000
+0100
@@ -0,0 +1,8 @@
+/* PR c++/69797 */
+/* { dg-do compile } */
+
+void
+foo ()
+{
+ __atomic_fetch_add (); /* { dg-error "too few arguments to function" }
*/
+}
Jakub
