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      1 // RUN: %clang_cc1 -fsyntax-only -Wused-but-marked-unused -Wunused-function -Wunneeded-internal-declaration -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{{not needed and will not be emitted}}
     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{{not needed and will not be emitted}}
     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 }
     57 
     58 // rdar://12233989
     59 extern void a(void) __attribute__((unused));
     60 extern void b(void) __attribute__((unused));
     61 
     62 void b(void)
     63 {
     64 }
     65 void a(void)
     66 {
     67   b();
     68 }
     69