gcc-4_9/gcc/testsuite/c-c++-common/Wunused-var-9.c

   1 /* { dg-options "-Wunused" } */
   2 /* { dg-do compile } */
   3
   4 int f1 (int *, int);
   5 int f2 (int *);
   6 int f3 (int *);
   7
   8 int
   9 f4 (int x)
  10 {
  11   int a, n = 0;
  12   int b;
  13   for (a = f1 (&b, x); f2 (&b); (void) (a = f3 (&b)))
  14     n++;
  15   return n;
  16 }
  17
  18 void
  19 f5 (int x)
  20 {
  21   int a;
  22   a = x;
  23   (void) (a = x);
  24 }
  25
  26 void
  27 f6 (int x)
  28 {
  29   int a;        /* { dg-warning "set but not used" } */
  30   a = x;
  31 }
  32
  33 void
  34 f7 (int x)
  35 {
  36   int a;
  37   ({ a = x; });
  38 }
  39
  40 int
  41 f8 (int x)
  42 {
  43   int a;
  44   int b = ({ a = x; });
  45   return b;
  46 }
  47
  48 int v;
  49
  50 void
  51 f9 (int x)
  52 {
  53   int a;
  54   ({ v++, a = x; });
  55 }
  56
  57 int
  58 f10 (int x)
  59 {
  60   int a;
  61   int b = ({ v++, a = x; });
  62   return b;
  63 }
  64
  65 void
  66 f11 (int x)
  67 {
  68   int a;
  69   a = x;
  70   ({ v++, a; });
  71 }
  72
  73 int
  74 f12 (int x)
  75 {
  76   int a;
  77   a = x;
  78   int b = ({ v++, a; });
  79   return b;
  80 }