gcc/testsuite/gcc.c-torture/execute/20071219-1.c

   1 /* PR c++/34459 */
   2
   3 extern void abort (void);
   4 extern void *memset (void *s, int c, __SIZE_TYPE__ n);
   5
   6 struct S
   7 {
   8   char s[25];
   9 };
  10
  11 struct S *p;
  12
  13 void __attribute__((noinline,noclone))
  14 foo (struct S *x, int set)
  15 {
  16   int i;
  17   for (i = 0; i < sizeof (x->s); ++i)
  18     if (x->s[i] != 0)
  19       abort ();
  20     else if (set)
  21       x->s[i] = set;
  22   p = x;
  23 }
  24
  25 void __attribute__((noinline,noclone))
  26 test1 (void)
  27 {
  28   struct S a;
  29   memset (&a.s, '\0', sizeof (a.s));
  30   foo (&a, 0);
  31   struct S b = a;
  32   foo (&b, 1);
  33   b = a;
  34   b = b;
  35   foo (&b, 0);
  36 }
  37
  38 void __attribute__((noinline,noclone))
  39 test2 (void)
  40 {
  41   struct S a;
  42   memset (&a.s, '\0', sizeof (a.s));
  43   foo (&a, 0);
  44   struct S b = a;
  45   foo (&b, 1);
  46   b = a;
  47   b = *p;
  48   foo (&b, 0);
  49 }
  50
  51 void __attribute__((noinline,noclone))
  52 test3 (void)
  53 {
  54   struct S a;
  55   memset (&a.s, '\0', sizeof (a.s));
  56   foo (&a, 0);
  57   struct S b = a;
  58   foo (&b, 1);
  59   *p = a;
  60   *p = b;
  61   foo (&b, 0);
  62 }
  63
  64 int
  65 main (void)
  66 {
  67   test1 ();
  68   test2 ();
  69   test3 ();
  70   return 0;
  71 }