gcc/testsuite/gcc.c-torture/execute/960521-1.c

   1 /* { dg-add-options stack_size } */
   2
   3 #include <stdlib.h>
   4
   5 int *a, *b;
   6 int n;
   7
   8 #ifdef STACK_SIZE
   9 #define BLOCK_SIZE (STACK_SIZE / (sizeof (*a) + sizeof (*b)))
  10 #else
  11 #define BLOCK_SIZE 32768
  12 #endif
  13 foo ()
  14 {
  15   int i;
  16   for (i = 0; i < n; i++)
  17     a[i] = -1;
  18   for (i = 0; i < BLOCK_SIZE - 1; i++)
  19     b[i] = -1;
  20 }
  21
  22 main ()
  23 {
  24   n = BLOCK_SIZE;
  25   a = malloc (n * sizeof(*a));
  26   b = malloc (n * sizeof(*b));
  27   *b++ = 0;
  28   foo ();
  29   if (b[-1])
  30     abort ();
  31   exit (0);
  32 }