1  /* { dg-do compile } */ 
       2  /* { dg-options "-O2 -fdump-tree-optimized -ffast-math" } */
       3  float a, b, c, d;
       4  extern int printf (const char *, ...);
       5  int main(void)
       6  {
       7    float e;
       8    float f;
       9    /* We should not be able to transform these into the same expression, and only have two additions.  */
      10    e = a + b;
      11    e = e + c;
      12    f = c + a;
      13    f = f + b;
      14    printf ("%f %f\n", e, f);
      15  }
      16  
      17  /* { dg-final { scan-tree-dump-times "\\\+" 2 "optimized"} } */