--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/c-c++-common/Wunused-var-7.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,48 @@
+/* PR c++/44062 */
+/* { dg-do compile } */
+/* { dg-options "-Wunused" } */
+
+void
+foo (void)
+{
+  int a, b, c, d, e, f, g;
+  a = 1;
+  b = 2;
+  c = 3;
+  d = 4;
+  e = 5;
+  f = 6;
+  g = 7;
+  a;			/* { dg-warning "no effect" } */
+  b, 1;			/* { dg-warning "no effect" } */
+  (void) c;
+  (void) d, 1;		/* { dg-warning "no effect" } */
+  e, f, 1;		/* { dg-warning "no effect" } */
+  (void) g, f, 1;	/* { dg-warning "no effect" } */
+}
+
+void
+bar (void)
+{
+  int a;
+  int b;
+  int c;		/* { dg-warning "set but not used" } */
+  a = 1;
+  b = 2;
+  c = 3;
+  c = ({ a++, b; });
+}
+
+void
+baz (void)
+{
+  int a;
+  int b;
+  int c;
+  int d;
+  a = 1;
+  b = 2;
+  c = 3;
+  d = 4;
+  d, ( a++, b ), c;	/* { dg-warning "no effect" } */
+}