gcc/testsuite/gcc.dg/pr64087.c

/* PR rtl-optimization/64087 */
/* { dg-do compile } */
/* { dg-options "-O3" } */

int printf (const char *, ...);

int a[72], b, c, d, e;

int
main ()
{
  int h;
  for (b = 0; b < 72; b++)
    {
      h = 1;
      if (b)
	h >>= 1;
      a[b] = h;
    }
  for (; e; e++)
    for (c = 0; c < 1;)
      for (; d;)
	{
	  printf ("0");
	  int g;
	  for (b = 0; b < 72; b++)
	    {
	      g = 1;
	      if (b)
		g >>= 1;
	      a[b] = g;
	    }
	}
  return 0;
}