clang/test/Sema/warn-unused-function.c

   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 -Wno-infinite-recursion %s
   4
   5 void foo(void) {}
   6 static void f2(void) {}
   7 static void f1(void) {f2();} // expected-warning{{unused}}
   8
   9 static int f0(void) { return 17; } // expected-warning{{not needed and will not be emitted}}
  10 int x = sizeof(f0());
  11
  12 static void f3(void);
  13 extern void f3(void) { } // expected-warning{{unused}}
  14
  15 inline static void f4(void);
  16 void f4(void) { } // expected-warning{{unused}}
  17
  18 static void __attribute__((used)) f5(void) {}
  19 static void f6(void);
  20 static void __attribute__((used)) f6(void);
  21 static void f6(void) {};
  22
  23 static void f7(void);
  24 void f8(void(*a0)(void));
  25 void f9(void) { f8(f7); }
  26 static void f7(void) {}
  27
  28 __attribute__((unused)) static void bar(void);
  29 void bar(void) { }
  30
  31 __attribute__((constructor)) static void bar2(void);
  32 void bar2(void) { }
  33
  34 __attribute__((destructor)) static void bar3(void);
  35 void bar3(void) { }
  36
  37 static void f10(void); // expected-warning{{unused}}
  38 static void f10(void);
  39
  40 static void f11(void);
  41 static void f11(void) { }  // expected-warning{{unused}}
  42
  43 static void f12(void) { }  // expected-warning{{unused}}
  44 static void f12(void);
  45
  46 // PR7923
  47 static void unused(void) { unused(); }  // expected-warning{{not needed and will not be emitted}}
  48
  49 // rdar://8728293
  50 static void cleanupMalloc(char * const * const allocation) { }
  51 void f13(void) {
  52   char * const __attribute__((cleanup(cleanupMalloc))) a;
  53   (void)a;
  54 }
  55
  56 // rdar://12233989
  57 extern void a(void) __attribute__((unused));
  58 extern void b(void) __attribute__((unused));
  59
  60 void b(void)
  61 {
  62 }
  63 void a(void)
  64 {
  65   b();
  66 }