gcc/testsuite/gcc.c-torture/execute/pr37573.c

   1 /* PR tree-optimization/37573 */
   2 /* { dg-require-effective-target int32plus } */
   3
   4 struct S
   5 {
   6   unsigned int *a;
   7   unsigned int b;
   8   unsigned int c[624];
   9 };
  10
  11 static unsigned char __attribute__((noinline))
  12 foo (struct S *s)
  13 {
  14   unsigned int r;
  15   if (!--s->b)
  16     {
  17       unsigned int *c = s->c;
  18       unsigned int i;
  19       s->a = c;
  20       for (i = 0; i < 227; i++)
  21         c[i] = ((((c[i] ^ c[i + 1]) & 0x7ffffffe) ^ c[i]) >> 1)
  22             ^ ((0 - (c[i + 1] & 1)) & 0x9908b0df) ^ c[i + 397];
  23     }
  24   r = *(s->a++);
  25   r ^= (r >> 11);
  26   r ^= ((r & 0xff3a58ad) << 7);
  27   r ^= ((r & 0xffffdf8c) << 15);
  28   r ^= (r >> 18);
  29   return (unsigned char) (r >> 1);
  30 }
  31
  32 static void __attribute__((noinline))
  33 bar (unsigned char *p, unsigned int q, unsigned int r)
  34 {
  35   struct S s;
  36   unsigned int i;
  37   unsigned int *c = s.c;
  38   *c = r;
  39   for (i = 1; i < 624; i++)
  40     c[i] = i + 0x6c078965 * ((c[i - 1] >> 30) ^ c[i - 1]);
  41   s.b = 1;
  42   while (q--)
  43     *p++ ^= foo (&s);
  44 };
  45
  46 static unsigned char p[23] = {
  47   0xc0, 0x49, 0x17, 0x32, 0x62, 0x1e, 0x2e, 0xd5, 0x4c, 0x19, 0x28, 0x49,
  48   0x91, 0xe4, 0x72, 0x83, 0x91, 0x3d, 0x93, 0x83, 0xb3, 0x61, 0x38
  49 };
  50
  51 static unsigned char q[23] = {
  52   0x3e, 0x41, 0x55, 0x54, 0x4f, 0x49, 0x54, 0x20, 0x55, 0x4e, 0x49, 0x43,
  53   0x4f, 0x44, 0x45, 0x20, 0x53, 0x43, 0x52, 0x49, 0x50, 0x54, 0x3c
  54 };
  55
  56 int
  57 main (void)
  58 {
  59   unsigned int s;
  60   s = 23;
  61   bar (p, s, s + 0xa25e);
  62   if (__builtin_memcmp (p, q, s) != 0)
  63     __builtin_abort ();
  64   return 0;
  65 }
  66