+
−/* PR c/64637 */
+
−/* { dg-do compile } */
+
−/* { dg-options "-Wunused" } */
+
−
+
−void g ();
+
−
+
−void
+
−f (int b)
+
−{
+
−  for (int i = 0; i < b; i + b) /* { dg-warning "28:statement with no effect" } */
+
−    g ();
+
−  // PARM_DECLs still don't have a location, don't expect an exact location.
+
−  for (int i = 0; i < b; b) /* { dg-warning "statement with no effect" } */
+
−    g ();
+
−  for (int i = 0; i < b; !i) /* { dg-warning "26:statement with no effect" } */
+
−    g ();
+
−  for (!b;;) /* { dg-warning "8:statement with no effect" } */
+
−    g ();
+
−  for (;; b * 2) /* { dg-warning "13:statement with no effect" } */
+
−    g ();
+
−  ({
+
−     b / 5; /* { dg-warning "8:statement with no effect" } */
+
−     b ^ 5;
+
−   });
+
−}