test/Sema/warn-unused-function.c

   1 // RUN: %clang_cc1 -fsyntax-only -Wunused-function -verify %s
   2 // RUN: %clang_cc1 -fsyntax-only -verify -Wunused %s
   3 // RUN: %clang_cc1 -fsyntax-only -verify -Wall %s
   4
   5 void foo() {}
   6 static void f2() {}
   7 static void f1() {f2();} // expected-warning{{unused}}
   8
   9 static int f0() { return 17; } // expected-warning{{unused}}
  10 int x = sizeof(f0());
  11
  12 static void f3();
  13 extern void f3() { } // expected-warning{{unused}}
  14
  15 // FIXME: This will trigger a warning when it should not.
  16 // Update once PR6281 is fixed.
  17 //inline static void f4();
  18 //void f4() { }
  19
  20 static void __attribute__((used)) f5() {}
  21 static void f6();
  22 static void __attribute__((used)) f6();
  23 static void f6() {};
  24
  25 static void f7(void);
  26 void f8(void(*a0)(void));
  27 void f9(void) { f8(f7); }
  28 static void f7(void) {}
  29
  30 __attribute__((unused)) static void bar(void);
  31 void bar(void) { }
  32
  33 __attribute__((constructor)) static void bar2(void);
  34 void bar2(void) { }
  35
  36 __attribute__((destructor)) static void bar3(void);
  37 void bar3(void) { }
  38
  39 static void f10(void); // expected-warning{{unused}}
  40 static void f10(void);
  41
  42 static void f11(void);
  43 static void f11(void) { }  // expected-warning{{unused}}
  44
  45 static void f12(void) { }  // expected-warning{{unused}}
  46 static void f12(void);
  47
  48 // PR7923
  49 static void unused(void) { unused(); }  // expected-warning{{unused}}
  50
  51 // rdar://8728293
  52 static void cleanupMalloc(char * const * const allocation) { }
  53 void f13(void) {
  54   char * const __attribute__((cleanup(cleanupMalloc))) a;
  55   (void)a;
  56 }