1  /* PR tree-optimization/104639 */
       2  /* { dg-do compile } */
       3  /* { dg-options "-O2 -g -fdump-tree-optimized" } */
       4  /* { dg-final { scan-tree-dump-not "PHI <" "optimized" } } */
       5  /* { dg-final { scan-tree-dump-times "i_\[0-9]*\\\(D\\\) != 0;" 1 "optimized" } } */
       6  
       7  _Bool
       8  foo (int i)
       9  {
      10    while (i == 4)
      11      i += 2;
      12    return i;
      13  }