1  /* { dg-do compile } */
       2  /* { dg-options "-O -fdump-tree-fre1-details" } */
       3  
       4   int i; int foo(void) { i = 2; int j = i * 2; int k = i + 2; return j == k; }
       5  /* { dg-final { scan-tree-dump-times "Replaced " 6 "fre1" } } */