1 /* { dg-do compile } */
2 /* { dg-options "-O2 -fdump-tree-optimized" } */
3 
4 int
foo(unsigned char a,_Bool b)5 foo (unsigned char a, _Bool b)
6 {
7   return (!a & a) | (b & !b);
8 }
9 
10 /* As long as comparisons aren't boolified and casts from boolean-types
11    aren't preserved, the folding of  X & !X to zero fails.  */
12 /* { dg-final { scan-tree-dump-times "return 0" 1 "optimized" { xfail *-*-* } } } */
13 /* { dg-final { cleanup-tree-dump "optimized" } } */
14