1  /* Straight-line strength reduction control flow variation with incr = -1.  */
       2  
       3  /* { dg-do compile } */
       4  /* { dg-options "-O3 -fdump-tree-optimized" } */
       5  
       6  int
       7  f (int n, int c, int s)
       8  {
       9    int a1, a2, a3, a4, x1, x2, x3, x4;
      10  
      11    a1 = 4 * s;
      12    x1 = c + a1;
      13    x2 = x3 = x4 = c;
      14  
      15    if (n > 64)
      16      {
      17        a2 = 3 * s;
      18        x2 = c + a2;
      19        a3 = 2 * s;
      20        x3 = c + a3;
      21      }
      22    else
      23      {
      24        a4 = 3 * s;
      25        x4 = c + a4;
      26      }
      27  
      28    return x1 + x2 + x3 + x4;
      29  }
      30  
      31  /* { dg-final { scan-tree-dump-times " \\* " 1 "optimized" } } */