1/* { dg-do compile } */ 2/* { dg-options "-Wunused -W" } */ 3 4int 5f1 (unsigned int x) 6{ 7 int c = ({ union { unsigned int a; int b; } u; u.a = x; u.b; }); 8 return c; 9} 10 11void 12f2 (void) 13{ 14 struct S { int i; } a; 15 int b[1]; 16 a.i = 1; 17 a.i; /* { dg-warning "no effect" } */ 18 b[0] = 1; 19 b[0]; /* { dg-warning "no effect" } */ 20} 21 22void 23f3 (void) 24{ 25 struct S { int i; } a; /* { dg-warning "set but not used" } */ 26 int b[1]; /* { dg-warning "set but not used" } */ 27 a.i = 1; 28 b[0] = 1; 29} 30