gcc/testsuite/gcc.dg/Wunused-var-5.c

   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); }