/* PR optimization/10171 *//* Bug: unroll_loop misoptimized the function so that we got   0 iterations of the loop rather than the correct 1.  *//* { dg-do run } */extern void abort (void);extern void exit (int);__inline__ int tag() { return 0; }void f ();int main() {  int i;  for (i = 0; i < (tag() ? 2 : 1); i++)    f();  abort ();}void f (){  exit (0);}