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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 
foo()5 void foo() {}
f2()6 static void f2() {}
f1()7 static void f1() {f2();} // expected-warning{{unused}}
8 
f0()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();
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 
f5()20 static void __attribute__((used)) f5() {}
21 static void f6();
22 static void __attribute__((used)) f6();
f6()23 static void f6() {};
24 
25 static void f7(void);
26 void f8(void(*a0)(void));
f9(void)27 void f9(void) { f8(f7); }
f7(void)28 static void f7(void) {}
29 
30 __attribute__((unused)) static void bar(void);
bar(void)31 void bar(void) { }
32 
33 __attribute__((constructor)) static void bar2(void);
bar2(void)34 void bar2(void) { }
35 
36 __attribute__((destructor)) static void bar3(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);
f11(void)43 static void f11(void) { }  // expected-warning{{unused}}
44 
f12(void)45 static void f12(void) { }  // expected-warning{{unused}}
46 static void f12(void);
47 
48 // PR7923
unused(void)49 static void unused(void) { unused(); }  // expected-warning{{not needed and will not be emitted}}
50 
51 // rdar://8728293
cleanupMalloc(char * const * const allocation)52 static void cleanupMalloc(char * const * const allocation) { }
f13(void)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 
b(void)62 void b(void)
63 {
64 }
a(void)65 void a(void)
66 {
67   b();
68 }
69