/* PR c/33238 */
/* { dg-do compile } */
/* { dg-options "-std=gnu89" } */
void
reverse (void *x, int y, int z)
{
struct { char w[z]; } *p = x, a;
int i, j;
for (i = y - 1, j = 0; j < y / 2; i--, j++)
({ a = p[i]; p[i] = p[j]; p[j] = a; });
}