gcc/testsuite/gcc.dg/pr64637.c

   1 /* PR c/64637 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-Wunused" } */
   4
   5 void g ();
   6
   7 void
   8 f (int b)
   9 {
  10   for (int i = 0; i < b; i + b) /* { dg-warning "28:statement with no effect" } */
  11     g ();
  12   // PARM_DECLs still don't have a location, don't expect an exact location.
  13   for (int i = 0; i < b; b) /* { dg-warning "statement with no effect" } */
  14     g ();
  15   for (int i = 0; i < b; !i) /* { dg-warning "26:statement with no effect" } */
  16     g ();
  17   for (!b;;) /* { dg-warning "8:statement with no effect" } */
  18     g ();
  19   for (;; b * 2) /* { dg-warning "13:statement with no effect" } */
  20     g ();
  21   ({
  22      b / 5; /* { dg-warning "8:statement with no effect" } */
  23      b ^ 5;
  24    });
  25 }