gcc/testsuite/c-c++-common/Wunused-var-7.c

   1 /* PR c++/44062 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-Wunused" } */
   4
   5 void
   6 foo (void)
   7 {
   8   int a, b, c, d, e, f, g;
   9   a = 1;
  10   b = 2;
  11   c = 3;
  12   d = 4;
  13   e = 5;
  14   f = 6;
  15   g = 7;
  16   a;                    /* { dg-warning "no effect" } */
  17   b, 1;                 /* { dg-warning "no effect" } */
  18   (void) c;
  19   (void) d, 1;          /* { dg-warning "no effect" } */
  20   e, f, 1;              /* { dg-warning "no effect" } */
  21   (void) g, f, 1;       /* { dg-warning "no effect" } */
  22 }
  23
  24 void
  25 bar (void)
  26 {
  27   int a;
  28   int b;
  29   int c;                /* { dg-warning "set but not used" } */
  30   a = 1;
  31   b = 2;
  32   c = 3;
  33   c = ({ a++, b; });
  34 }
  35
  36 void
  37 baz (void)
  38 {
  39   int a;
  40   int b;
  41   int c;
  42   int d;
  43   a = 1;
  44   b = 2;
  45   c = 3;
  46   d = 4;
  47   d, ( a++, b ), c;     /* { dg-warning "no effect" } */
  48 }