1  /* PR c/99588 */
       2  /* { dg-do compile } */
       3  /* { dg-options "-std=c11 -Wunused-but-set-variable" } */
       4  
       5  void bar (int, ...);
       6  void f1 (void) { static _Atomic int x = 0; bar (0, x); }
       7  void f2 (void) { static _Atomic int x = 0; bar (0, x += 1); }
       8  void f3 (void) { static _Atomic int x = 0; bar (x); }
       9  void f4 (void) { static _Atomic int x = 0; bar (x += 1); }
      10  void f5 (void) { static _Atomic int x = 0; bar (x = 1); }
      11  void f6 (void) { static _Atomic int x = 0; x = 1; }	/* { dg-warning "variable 'x' set but not used" } */
      12  void f7 (void) { static _Atomic int x = 0; x += 3; }
      13  void f8 (void) { _Atomic int x = 0; bar (0, x); }
      14  void f9 (void) { _Atomic int x = 0; bar (0, x += 1); }
      15  void f10 (void) { _Atomic int x = 0; bar (x); }
      16  void f11 (void) { _Atomic int x = 0; bar (x += 1); }
      17  void f12 (void) { _Atomic int x = 0; bar (x = 1); }
      18  void f13 (void) { _Atomic int x = 0; x = 1; }		/* { dg-warning "variable 'x' set but not used" } */
      19  void f14 (void) { _Atomic int x = 0; x += 3; }
      20  void f15 (void) { _Atomic int x = 0; int y = 3; x += y; }
      21  void f16 (void) { _Atomic int x = 0; int y = 3; bar (x += y); }
      22  void f17 (void) { _Atomic int x = 0; int y = 3; x = y; }	/* { dg-warning "variable 'x' set but not used" } */
      23  void f18 (void) { _Atomic int x = 0; int y = 3; bar (x = y); }