gcc-you can use this code to learn something about gcc, and inquire further into linux,

				f ()				{				  long dx[2055];				  long dy[2055];				  long s1[2055];				  int x, y;				  int i;				  long s;								  for (;;)				    {				      s = 2055;				      g (s1, s);				      for (i = 0; i < 1; i++);				      dy[s] = 0x12345;				      for (i = 0; i < 1; i++);				      if (x != y || h (dx, dy, s) || dx[s] != 0x12345)					{					  j (y);k (dy);					}				    }				}