1  /* PR tree-optimization/90211 */
       2  /* { dg-do compile } */
       3  /* { dg-require-effective-target pthread } */
       4  /* { dg-options "-O3 -fassociative-math -ftree-parallelize-loops=2 -fno-signed-zeros -fno-trapping-math -fno-tree-copy-prop" } */
       5  
       6  double
       7  foo (int x)
       8  {
       9    double a, b = 0.0;
      10    while (x < 3)
      11      {
      12        int c;
      13        a = 0.0;
      14        c = 0;
      15        while (c < x)
      16          {
      17            a += 1.0;
      18            ++c;
      19          }
      20        b += 1.0;
      21        ++x;
      22      }
      23    return a + b;
      24  }