gcc/testsuite/gcc.c-torture/execute/20070919-1.c

   1 /* PR c/33238 */
   2
   3 typedef __SIZE_TYPE__ size_t;
   4 int memcmp (const void *, const void *, size_t);
   5 void abort (void);
   6
   7 void
   8 __attribute__((noinline))
   9 bar (void *x, void *y)
  10 {
  11   struct S { char w[8]; } *p = x, *q = y;
  12   if (memcmp (p->w, "zyxwvut", 8) != 0)
  13     abort ();
  14   if (memcmp (q[0].w, "abcdefg", 8) != 0)
  15     abort ();
  16   if (memcmp (q[1].w, "ABCDEFG", 8) != 0)
  17     abort ();
  18   if (memcmp (q[2].w, "zyxwvut", 8) != 0)
  19     abort ();
  20   if (memcmp (q[3].w, "zyxwvut", 8) != 0)
  21     abort ();
  22 }
  23
  24 void
  25 __attribute__((noinline))
  26 foo (void *x, int y)
  27 {
  28   struct S { char w[y]; } *p = x, a;
  29   int i;
  30   a = ({ struct S b; b = p[2]; p[3] = b; });
  31   bar (&a, x);
  32 }
  33
  34 int
  35 main (void)
  36 {
  37   struct S { char w[8]; } p[4]
  38     = { "abcdefg", "ABCDEFG", "zyxwvut", "ZYXWVUT" };
  39   foo (p, 8);
  40   return 0;
  41 }