gcc/testsuite/gcc.dg/pr59871.c

   1 /* PR c/59871 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-Wunused" } */
   4
   5 extern int bar ();
   6
   7 void
   8 foo (int *p, int i)
   9 {
  10   p[0] = (bar (), 1, bar ()); /* { dg-warning "right-hand operand of comma expression has no effect" } */
  11   p[1] = (1, bar ()); /* { dg-warning "left-hand operand of comma expression has no effect" } */
  12   bar (), 1, bar (); /* { dg-warning "right-hand operand of comma expression has no effect" } */
  13   bar (), 1; /* { dg-warning "right-hand operand of comma expression has no effect" } */
  14   1, bar (); /* { dg-warning "left-hand operand of comma expression has no effect" } */
  15   (bar (), 1); /* { dg-warning "right-hand operand of comma expression has no effect" } */
  16   bar (), 5 * i; /* { dg-warning "right-hand operand of comma expression has no effect" } */
  17   (bar (), 5 * i); /* { dg-warning "right-hand operand of comma expression has no effect" } */
  18   (bar (), (bar (), (bar (), (bar (), (bar (), (bar (), (bar (), 7))))))); /* { dg-warning "right-hand operand of comma expression has no effect" } */
  19   bar (), (bar (), (bar (), (bar (), (bar (), (bar (), (bar (), 7)))))); /* { dg-warning "right-hand operand of comma expression has no effect" } */
  20   bar (), (bar (), (bar (), (bar (), (bar (), (bar (), (7, bar ())))))); /* { dg-warning "left-hand operand of comma expression has no effect" } */
  21   (bar (), (bar (), (bar (), (bar (), (bar (), (bar (), (7, bar ()))))))); /* { dg-warning "left-hand operand of comma expression has no effect" } */
  22 }