1 /* { dg-do compile } */ 2 /* { dg-options "-O2 -fdump-tree-optimized" } */ 3 4 int foo(_Bool x)5 foo (_Bool x) 6 { 7 return (x ^ 1); 8 } 9 10 /* { dg-final { scan-tree-dump-times "~x" 1 "optimized" } } */ 11