1 // RUN: %clang_cc1 -verify -Wunused -Wused-but-marked-unused -Wunused-parameter -Wunused -fsyntax-only %s
2 
3 static void (*fp0)(void) __attribute__((unused));
4 
5 static void __attribute__((unused)) f0(void);
6 
7 // On K&R
8 int f1() __attribute__((unused));
9 
10 int g0 __attribute__((unused));
11 
12 int f2() __attribute__((unused(1, 2))); // expected-error {{'unused' attribute takes no arguments}}
13 
14 struct Test0_unused {} __attribute__((unused));
15 struct Test0_not_unused {};
16 typedef int Int_unused __attribute__((unused));
17 typedef int Int_not_unused;
18 
test0()19 void test0() {
20   int x; // expected-warning {{unused variable}}
21 
22   Int_not_unused i0; // expected-warning {{unused variable}}
23   Int_unused i1; // expected-warning {{'Int_unused' was marked unused but was used}}
24 
25   struct Test0_not_unused s0; // expected-warning {{unused variable}}
26   struct Test0_unused s1; // expected-warning {{'Test0_unused' was marked unused but was used}}
27 }
28 
f3(int x)29 int f3(int x) { // expected-warning{{unused parameter 'x'}}
30   return 0;
31 }
32 
f4(int x)33 int f4(int x) {
34   return x;
35 }
36 
f5(int x)37 int f5(int x __attribute__((__unused__))) {
38   return 0;
39 }
40 
f6(int x)41 int f6(int x __attribute__((__unused__))) {
42   return x; // expected-warning{{'x' was marked unused but was used}}
43 }
44