gcc/testsuite/gcc.dg/binop-notor1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-optimized" } */
   3
   4 int
   5 foo (_Bool a, _Bool b)
   6 {
   7   return (a | !a) | (!b | b);
   8 }
   9
  10 /* { dg-final { scan-tree-dump-times "return 1" 1 "optimized" } } */