1 /* { dg-do compile } */
2 /* { dg-options "-O -fdump-tree-fre1" } */
3 
4 int x;
foo(void)5 int foo (void)
6 {
7   x = 1;
8   return __builtin_ffs (x);
9 }
10 
11 /* { dg-final { scan-tree-dump-not "ffs" "fre1" } } */
12