1 // RUN: %clang_cc1 -fsyntax-only -Wunused-parameter -Wused-but-marked-unused -Wunused -verify %s
2 
3 void f1(void) {
4   int x, y, z;
5   #pragma unused(x)
6   #pragma unused(y, z)
7 
8   int w; // expected-warning {{unused}}
9   #pragma unused w // expected-warning{{missing '(' after '#pragma unused' - ignoring}}
10 }
11 
12 void f2(void) {
13   int x, y; // expected-warning {{unused}} expected-warning {{unused}}
14   #pragma unused(x,) // expected-warning{{expected '#pragma unused' argument to be a variable name}}
15   #pragma unused() // expected-warning{{expected '#pragma unused' argument to be a variable name}}
16 }
17 
18 void f3(void) {
19   #pragma unused(x) // expected-warning{{undeclared variable 'x' used as an argument for '#pragma unused'}}
20 }
21 
22 void f4(void) {
23   int w; // expected-warning {{unused}}
24   #pragma unused((w)) // expected-warning{{expected '#pragma unused' argument to be a variable name}}
25 }
26 
27 void f6(void) {
28   int z; // no-warning
29   {
30     #pragma unused(z) // no-warning
31   }
32 }
33 
34 void f7() {
35   int y;
36   #pragma unused(undeclared, undefined, y) // expected-warning{{undeclared variable 'undeclared' used as an argument for '#pragma unused'}} expected-warning{{undeclared variable 'undefined' used as an argument for '#pragma unused'}}
37 }
38 
39 int f8(int x) { // expected-warning{{unused parameter 'x'}}
40   return 0;
41 }
42 
43 int f9(int x) {
44   return x;
45 }
46 
47 int f10(int x) {
48   #pragma unused(x)
49   return 0;
50 }
51 
52 int f11(int x) {
53   #pragma unused(x)
54   return x; // expected-warning{{'x' was marked unused but was used}}
55 }
56 
57 int f12(int x) {
58   int y = x;
59   #pragma unused(x) // expected-warning{{'x' was marked unused but was used}}
60   return y;
61 }
62 
63 // rdar://8793832
64 static int glob_var = 0;
65 #pragma unused(glob_var)
66