1 // RUN: %clang_cc1 -fsyntax-only -Wunused-variable -fblocks -verify %s
2
3 struct s0 {
4 unsigned int i;
5 };
6
7 int proto(int a, int b);
8
f0(void)9 void f0(void) {
10 int a __attribute__((unused)),
11 b; // expected-warning{{unused}}
12 return;
13 }
14
f1(void)15 void f1(void) {
16 int i;
17 (void)sizeof(i);
18 return;
19 }
20
21 // PR5933
f2(void)22 int f2(void) {
23 int X = 4; // Shouldn't have a bogus 'unused variable X' warning.
24 return Y + X; // expected-error {{use of undeclared identifier 'Y'}}
25 }
26
f3(void)27 int f3(void) {
28 int X1 = 4;
29 (void)(Y1 + X1); // expected-error {{use of undeclared identifier 'Y1'}}
30 (void)(^() { int X = 4; }); // expected-warning{{unused}}
31 (void)(^() { int X = 4; return Y + X; }); // expected-error {{use of undeclared identifier 'Y'}}
32 }
33
34 void c1(int *);
f4(void)35 void f4(void) {
36 int __attribute__((cleanup(c1))) X1 = 4;
37 }
38