gcc/testsuite/gcc.c-torture/compile/bcopy.c

   1 /* { dg-add-options stack_size } */
   2 /* { dg-require-stack-size "[dg-effective-target-value stack_size]*2" } */
   3 /* { dg-additional-options "-std=gnu89" } */
   4
   5 void
   6 bcopy1 (s, d, c)
   7      long long *s;
   8      long long *d;
   9      int c;
  10 {
  11   int i;
  12   c = c / 8;
  13   for (i = 0;  i < c;  i++)
  14     d[i] = s[i];
  15 }
  16
  17 void
  18 bcopy2 (s, d, c)
  19      long *s;
  20      long *d;
  21      int c;
  22 {
  23   int i;
  24   c = c / 4;
  25   for (i = 0;  i < c;  i++)
  26     d[i] = s[i];
  27 }
  28
  29
  30 void
  31 bcopy3 (s, d, c)
  32      char *s;
  33      char *d;
  34      int c;
  35 {
  36   long long z0, z1;
  37   int r = d - s;
  38
  39   int i;
  40
  41   c /= 16;
  42
  43   z0 = *((long long *) s);
  44   s += 8;
  45   z1 = *((long long *) s);
  46   s += 8;
  47   for (i = 0; i < c; i++)
  48     {
  49       *(long long *)(s + r) = z0;
  50       z0 = *((long long *) s);
  51       s += 8;
  52       *(long long *)(s + r) = z1;
  53       z1 = *((long long *) s);
  54       s += 8;
  55     }
  56 }
  57
  58 #if defined(STACK_SIZE) && STACK_SIZE < 16384
  59 #define BYTES STACK_SIZE
  60 #else
  61 #define BYTES 16384
  62 #endif
  63
  64 main ()
  65 {
  66   long long s[BYTES / 8];
  67   long long d[BYTES / 8];
  68   int i;
  69
  70   for (i = 1; i < 67108864 / BYTES; i++)
  71     bcopy (s, d, BYTES);
  72 }